A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Solve 3x2 + 6x = 8. 1 plus or minus 2 square root 33 the quantity of negative 3 plus or minus I square root 15 all over 3 the quantity of negative 3 plus or minus square root 33 all over 3 1 plus or minus 2 i square root 15

  • This Question is Closed
  1. sepeario
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Okay are these 5 different questions? It's really unclear.

  2. sepeario
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    For the first bit to solve 3x^2 + 6x = 8, have you heard of completing the square?

  3. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no the bottom ones are the answer choices

  4. sepeario
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Oh right. So have you heard of completing the square?

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no :/

  6. sepeario
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    It's a way to solve the trinomial like you have above. I'll show you the steps. \[3x^2+6x=8\] The first step is to move the constant (8) on the other side but that is already done. What you have to do now is to take half the coefficient of x and add it to both sides. Can you do that?

  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    idk how.... man i must sound dumb as hell XD

  8. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @Sepeario

  9. sepeario
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Nah this is actually pretty hard.. but very useful when you learn it. In the term 6x, what is the coefficient of x (the number before x essentially).

  10. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    3?

  11. campbell_st
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    the easiest thing to do is rewrite the equation as \[3x^2 + 6x - 8 = 0\] then use the general quadratic formula for a quadratic \[ax^2 + bx - c = 0\] the formula is \[x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\] your question has a = 3, b - 6 and c = -8 substitute the values and calculate the answers

  12. campbell_st
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    oops b = 6 a typo in the response above.

  13. sepeario
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    or you could do that.. I like completing the square. if you learn it it's much quicker than substituting values into the formula.

  14. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    lol you still at this?

  15. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    must be like a homework marathon

  16. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    lol 51 questions XD @satellite73

  17. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i hope this is like 47 at least

  18. sepeario
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    what topic is this on?

  19. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    do what @campbell_st said use \[x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\] with \[a=3,b=6,c=-8\] that is all compute carefully

  20. sepeario
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    probably quadratics and polynomials and stuff like that

  21. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i am i got \[-6\pm \sqrt{132}\6\]

  22. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    want me to check it?

  23. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    idk i just want the answer XD

  24. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    im tired of algebra. its been 3 hours and im still on the same freaking thing!

  25. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    that is the answer, before you "simplify it" it is probably not one of your answer choices

  26. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    is one of them \[\frac{-3\pm\sqrt{33}}{3}\]?

  27. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes XD

  28. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    then pick that one

  29. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    how many more?

  30. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    What is the simplified form of 3 over 2x minus 5 + 21 over 8 x squared minus 14x minus 15 ? 6 times the quantity 2 x plus 5 end quantity over the quantity 2x minus 5 end quantity times 4 x plus 3 6 times the quantity x plus 1 end quantity over the quantity 2x minus 5 end quantity times 4 x plus 3 6 time the quantity x plus 1 end quantity over the quantity 2x minus 5 end quantity times 4 x plus 3 6 times the quantity x plus 1 end quantity over the quantity 2x plus 5 end quantity times 4 x plus 3

  31. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yikes

  32. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    those are just answer choices XD

  33. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    and i think that it is 6 times the quantity x plus 1 end quantity over the quantity 2x minus 5 end quantity times 4 x plus 3

  34. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[\frac{3}{2x-5}+\frac{21}{8x^2-14x-15}\] like that?

  35. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes

  36. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i can't read your answer really i know the denominator is correct \[(2x-5)(4x+3)\]

  37. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    6(x+1)/(2x-5)(4x+3)

  38. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    What is the simplified form of the quantity 15 x y squared over x squared minus 5x plus 6 all over the quantity 5 x squared y over 2x squared minus 7x plus 3 ? 3y times the quantity 2x plus 1 over x times the quantity x plus 2 x times the quantity x plus 2 over 3y times the quantity 2x plus 1 x times the quantity x minus 2 over 3y times the quantity 2x minus 1 3y times the quantity 2x minus 1 over x times the quantity x minus 2

  39. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yikes

  40. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    hard to read again let me try

  41. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    XDDD

  42. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[\frac{15xy^2}{x^2-5x+6}\]?

  43. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i need a screenshot maybe

  44. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    idk how to do that

  45. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    hit "print screen" on your keyboard, then attach it

  46. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

  47. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    it's not working...

  48. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok give me a second was any part of what i wrote correct?

  49. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i bet it was a compound fraction which amounts to \[\frac{15xy^2}{x^2-5x+6}\times \frac{2x^2-7x+3}{5x^2y}\]

  50. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1438565010844:dw|

  51. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah what i wrote

  52. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    "invert and multiply" and get \[\frac{15xy^2}{x^2-5x+6}\times \frac{2x^2-7x+3}{5x^2y}\] as a first step

  53. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    then cancel some stuff, not much goes though

  54. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i don't understand

  55. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    when you divide by a fraction you "invert and multiply" just like with numbers

  56. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    all i did was flip the denominator of the expression you wrote then you can cancel a bit

  57. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    oh gotcha

  58. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[\frac{3y(2x^2-7x+3)}{x(x^2-5x+6)}\]

  59. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    nothing else cancels, so either that is the final answer or there is a typo

  60. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    that cant be

  61. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok i need something better sure you cannot take a screen shot?

  62. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    3y times the quantity 2x plus 1 over x times the quantity x plus 2 this is the closest thing to that

  63. sepeario
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    are you on a mac or windows?

  64. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    windows

  65. sepeario
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    is there a prt scr button?

  66. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes and i pressed it multiple times and it doesnt wrk

  67. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok i think i got it

  68. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Bob and Susie wash cars for extra money over the summer. Bob's income is determined by f(x) = 6x + 13, where x is the number of hours. Susie's income is g(x) = 4x + 18. If Bob and Susie were to combine their efforts, their income would be h(x) = f(x) + g(x). Assume Bob works 3 hours. Create the function h(x) and indicate if Bob will make more money working alone or by teaming with Susie. A h(x) = 2x + 5, work alone B h(x) = 2x + 5, team with Susie C h(x) = 10x + 31, team with Susie D h(x) = 10x + 31, work alone

  69. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    lol i have seen this exact silly question before

  70. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[h(x)=f(x)+g(x)=6x+13+4x+18\]

  71. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    combine like terms and get \[h(x)=10x+31\]

  72. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yea but would that be team with susie or work alone?

  73. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    hmm depends

  74. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[f(3)=6\times 3+13=31\]

  75. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[h(3)=10\times 3+31=61\]

  76. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    if he has to split the money with susie he is better off working alone

  77. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    lol okaiis

  78. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i can tell the end is in sight

  79. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    A function is created to represent the costs of living per person in the family. What restrictions would be made to the domain?

  80. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i guess it would have to be greater than or equal to zero

  81. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    A.The domain would only include integers. B.The domain would only include positive integers. C.The domain would only include positive numbers. D.The domain would include all real numbers.

  82. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i am going to make a guess, because none of this really makes too much sense

  83. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    make it a good guess XD

  84. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    A and B are clearly wrong, since it could be decimals (it is money after all)

  85. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i would go with C

  86. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    can't imagine the cost of living is negative

  87. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i only make good guesses they are, however, just guesses

  88. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    To which graph does the point (−1, 3) belong? A.y ≥ 2x + 6 B.y ≥ 3x − 1 C.y ≥ −x + 4 D.y ≥ −2x + 5

  89. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    idk lets try the first one is \[3\geq 2(-1)+6\]?

  90. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    nope you would have \[3\geq 4\]which is false

  91. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    this makes no sense

  92. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    sure it does

  93. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \((-1,3)\) is your \((x,y)\)

  94. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so to see if it satisfies \[y\geq 3x-1\] put \(x=-1\) and \(y=3\) and see if the inequality is right or wrong

  95. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thsts what i thought

  96. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    you get \[3\geq 3(-1)-1\] or \[3\geq -4\] which is definitely true

  97. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so at least that one is right can there be more than one answer?

  98. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    im done :D Let's see what i get!

  99. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    DONE!! its about time

  100. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    71%!!!!! :D

  101. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    now get away from the computer, stop doing math

  102. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    is that all?

  103. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    lol i might do one more XD

  104. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    should have got at least 95 with all the brilliant help you have been getting

  105. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    go have a beer, do it tomorrow if you are too young to have a beer, have a snack

  106. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Simplify completely quantity x squared plus 12 x plus 35 all over 3 x plus 15.

  107. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    quantity of x squared plus 21 over 3 quantity of x squared plus 11 over 3 quantity x plus 7 over 3 quantity of x plus 5 over 3

  108. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    just one more CX

  109. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    one more assignment i mean CX

  110. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    one more question for me

  111. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    awh man CX you're the only one responding CX

  112. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[\frac{x^2+12x+35}{3x+15}=\frac{(x+5)(x+7)}{3(x+5)}\] \[=\frac{x+7}{3}\]

  113. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    got it cx

  114. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    take a break for heaven's sake i went out, had dinner, watched an episode of columbo, and you were still here

  115. sepeario
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ^^ that rhymed

  116. pooja195
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    This is just sad.

  117. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    cx how is this sad CX

  118. pooja195
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    It just is.

  119. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.