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toxicsugar22

  • 5 years ago

Find the first three terms of the product in acending powers. (1-2x^2-x^4)(4+x^2-2x^4)

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  1. anonymous
    • 5 years ago
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    well, why don't you multiply the two polynomials and post what you got?

  2. toxicsugar22
    • 5 years ago
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    ok

  3. toxicsugar22
    • 5 years ago
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    i got 4-x^2-2x^4-8x^4x^6-4x^4-x^6-2x^8 is that right and if it isnt caould you please correct me

  4. anonymous
    • 5 years ago
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    okay so you got that. why don't you add up the like terms and post it here. for example, -2x^4 - 4x^4 = -6x^4

  5. anonymous
    • 5 years ago
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    there should be a plus of minus sign between 8x^4 and x^6 in the polynomial you posted

  6. toxicsugar22
    • 5 years ago
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    so my answer is not right

  7. toxicsugar22
    • 5 years ago
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    ohh i see there is a minus between 8x^4 and x^6

  8. toxicsugar22
    • 5 years ago
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    4-x^2-2x^4-8x^4-x^6-4x^4-x^6-2x^8

  9. anonymous
    • 5 years ago
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    okay, but you have to add up the like terms. you see, a^2 +3 a^2 = 4a^2. similarly -2x^4 - 8x^4 = -10x^4

  10. anonymous
    • 5 years ago
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    and so on. so group all the terms together and write down your expression

  11. toxicsugar22
    • 5 years ago
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    i dont know but i got 4-x^2-14x^4-2x^6-2x^8

  12. toxicsugar22
    • 5 years ago
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    is that right

  13. anonymous
    • 5 years ago
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    yes, that seems to be right. all you have to do now is see what the first three terms are in ascending order of powers.

  14. toxicsugar22
    • 5 years ago
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    is it 4-x^2-14x^4

  15. anonymous
    • 5 years ago
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    yes.

  16. toxicsugar22
    • 5 years ago
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    ok thanks you

  17. toxicsugar22
    • 5 years ago
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    cana you help me with on more promblem

  18. anonymous
    • 5 years ago
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    although you should say, the first three terms are 4, -x^2 and -14x^4

  19. anonymous
    • 5 years ago
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    you are welcome. post your other problem and we will see how to solve it.

  20. toxicsugar22
    • 5 years ago
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    A large wooden box is 3 feet longer than it is wide, and its height is 2 feet shorter than its width. a. If the width of the box is w, write expressions for its lenghth and its height. b. write a plynomial for the volume of the box. c. Write a polynomial for the surface area of the box

  21. toxicsugar22
    • 5 years ago
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    do u get it or no

  22. toxicsugar22
    • 5 years ago
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    ok srry not that one

  23. anonymous
    • 5 years ago
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    yes, i got it. do you want the answer or not?

  24. toxicsugar22
    • 5 years ago
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    yes

  25. toxicsugar22
    • 5 years ago
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    thanks

  26. anonymous
    • 5 years ago
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    okay it says the box is 3 feet longer than its width. so length = ?

  27. toxicsugar22
    • 5 years ago
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    i dont know can u show me the firt time please

  28. toxicsugar22
    • 5 years ago
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    can u help me please

  29. anonymous
    • 5 years ago
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    if width is w, length = w + 3feet.

  30. anonymous
    • 5 years ago
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    so if height is 2 feet less than width, height = ?

  31. toxicsugar22
    • 5 years ago
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    2-w

  32. toxicsugar22
    • 5 years ago
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    or w-2

  33. anonymous
    • 5 years ago
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    yes, w -2 is correct. so width is w, length is w+3 and height is w-2

  34. anonymous
    • 5 years ago
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    what is the volume and surface area then?

  35. toxicsugar22
    • 5 years ago
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    im not sure surface area is( w-2)(w+3)

  36. toxicsugar22
    • 5 years ago
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    can u help me

  37. anonymous
    • 5 years ago
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    what is the volume of a cuboid?

  38. anonymous
    • 5 years ago
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    just tell me the general formula.

  39. toxicsugar22
    • 5 years ago
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    ok the surface formula

  40. anonymous
    • 5 years ago
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    http://www.gcsemathstutor.com/images/shapespace/ss-vol-cuboid.jpg

  41. anonymous
    • 5 years ago
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    http://www.mathsteacher.com.au/year10/ch14_measurement/14_cuboid/20cuboid.htm

  42. toxicsugar22
    • 5 years ago
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    s=2lh+2wh+2lw

  43. toxicsugar22
    • 5 years ago
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    is that it

  44. anonymous
    • 5 years ago
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    yes. so express the surface area in terms of the height width and length of your cube.

  45. toxicsugar22
    • 5 years ago
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    so do i plug in the 3 and 2 for the height and the width

  46. anonymous
    • 5 years ago
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    your height is w -2 and length is w+3 and width is w. so plug those values.

  47. toxicsugar22
    • 5 years ago
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    so s=2(w+3)(w-2)+2(w)(w-2)+2(w+3)(w)

  48. toxicsugar22
    • 5 years ago
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    is it right

  49. anonymous
    • 5 years ago
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    yes

  50. toxicsugar22
    • 5 years ago
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    now do i distrubuite

  51. anonymous
    • 5 years ago
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    yes, you can do that

  52. toxicsugar22
    • 5 years ago
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    how do i muliply 2(w+3)(w-2)

  53. toxicsugar22
    • 5 years ago
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    can you just show me

  54. anonymous
    • 5 years ago
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    http://www.webmath.com/polymult.html

  55. toxicsugar22
    • 5 years ago
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    ok i got 6w^2+4w-12 is that right

  56. toxicsugar22
    • 5 years ago
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    is it right

  57. anonymous
    • 5 years ago
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    no

  58. toxicsugar22
    • 5 years ago
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    than can u help me

  59. toxicsugar22
    • 5 years ago
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    please

  60. anonymous
    • 5 years ago
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    i gave you the link, did you use it?

  61. toxicsugar22
    • 5 years ago
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    yes ill do it again

  62. anonymous
    • 5 years ago
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    okay.

  63. toxicsugar22
    • 5 years ago
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    igot the same thing

  64. toxicsugar22
    • 5 years ago
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    unless im doing something wrong

  65. toxicsugar22
    • 5 years ago
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    r u there

  66. anonymous
    • 5 years ago
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    yes, \[2(w+3)(w-2)=2(w \times w +3 \times w -2 \times w -2 \times 3)\]

  67. anonymous
    • 5 years ago
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    \[= 2(w ^{2}+w-6)=2w ^{2}+2w-12\]

  68. toxicsugar22
    • 5 years ago
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    is that it

  69. toxicsugar22
    • 5 years ago
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    is that the anwer to that question

  70. anonymous
    • 5 years ago
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    no, that is the multiplication of 2(w+3)(w-2) the surface area is 2 lw+2lh+2hw and the volume is lwh

  71. toxicsugar22
    • 5 years ago
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    ok can u help me step by step please

  72. toxicsugar22
    • 5 years ago
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    im so lost

  73. toxicsugar22
    • 5 years ago
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    can u help

  74. anonymous
    • 5 years ago
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    what do you need help with? I already explained everything to you.

  75. toxicsugar22
    • 5 years ago
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    no answering the suface area

  76. toxicsugar22
    • 5 years ago
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    please like how do u solve 2(w+3)(w-2)+2(w)(w-2)+2(w+3)(w)

  77. anonymous
    • 5 years ago
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    2w(w-2) = 2w^2-4w 2w(w+3) = 2w^2+6w. 2(w+3)(w-2) = 2w^2 +2w-12 add all three and post what you get.

  78. toxicsugar22
    • 5 years ago
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    6w^4w-12 is that right

  79. toxicsugar22
    • 5 years ago
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    is it

  80. toxicsugar22
    • 5 years ago
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    please help me

  81. toxicsugar22
    • 5 years ago
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    r u there

  82. anonymous
    • 5 years ago
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    yes that is right. that is the surface area.

  83. toxicsugar22
    • 5 years ago
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    ok and the volume of the box

  84. toxicsugar22
    • 5 years ago
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    the surface area of the the box is 6w^6+4w-12

  85. anonymous
    • 5 years ago
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    how did you get 6w^6 term in there?

  86. toxicsugar22
    • 5 years ago
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    i dk

  87. anonymous
    • 5 years ago
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    can you add the three terms like I said and post it here properly?

  88. toxicsugar22
    • 5 years ago
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    i did

  89. anonymous
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    2w(w-2) = 2w^2-4w 2w(w+3) = 2w^2+6w. 2(w+3)(w-2) = 2w^2 +2w-12 add all three and post what you get

  90. toxicsugar22
    • 5 years ago
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    that is what i got but i can doit again

  91. anonymous
    • 5 years ago
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    so how did you get a w^6 term there if you added them properly?

  92. toxicsugar22
    • 5 years ago
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    2w^2-4w 2w^2+6w. 2w^2 +2w-1=6w^6+4w-12

  93. anonymous
    • 5 years ago
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    okay, you added 2w^2+2w^2+2w^2 and got 6w^6?

  94. toxicsugar22
    • 5 years ago
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    can u help me please

  95. anonymous
    • 5 years ago
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    you added -4w+6w+2w and got 4w correct?

  96. anonymous
    • 5 years ago
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    then how did you add 2w^2+2w^2+2w^2 and get 6w^6? according to your logic, -4w+6w+2w should be 4w^3 isn't it?

  97. toxicsugar22
    • 5 years ago
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    ohh yes so can u write the answer again please

  98. anonymous
    • 5 years ago
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    no, I can't. I don't think you understood what I am trying to say to you. if you add 2 oranges to 2 oranges, how many oranges do you get?

  99. toxicsugar22
    • 5 years ago
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    4

  100. anonymous
    • 5 years ago
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    you get 4 what?

  101. toxicsugar22
    • 5 years ago
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    oranges

  102. anonymous
    • 5 years ago
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    okay so if you add two w squares to two w squares, how many w squares do you get?

  103. toxicsugar22
    • 5 years ago
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    4 w

  104. anonymous
    • 5 years ago
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    you get 4 w squares. correct? so if you add 2 w squares to two w squares to two w squares, how many w squares do you get?

  105. toxicsugar22
    • 5 years ago
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    6w

  106. anonymous
    • 5 years ago
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    okay, so what is 2w^2+2w^2+2w^2?

  107. toxicsugar22
    • 5 years ago
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    6w

  108. anonymous
    • 5 years ago
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    how is it 6w? you are saying that if you add 2 oranges to 2 oranges to 2 oranges you get 6 apples. how does that make any sense?

  109. toxicsugar22
    • 5 years ago
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    can u just show me

  110. anonymous
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    okay. 2 w^2 +2w^2+2w^2 = 6 w^2, not 6w^6

  111. anonymous
    • 5 years ago
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    do you understand?

  112. toxicsugar22
    • 5 years ago
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    ok thanks

  113. anonymous
    • 5 years ago
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    w^2 is the same as w times w.

  114. toxicsugar22
    • 5 years ago
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    i understand

  115. toxicsugar22
    • 5 years ago
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    can u help me with the volume now

  116. anonymous
    • 5 years ago
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    no, I think you can do that on your own. I will give you hint. volume is length times width times height. length is w+3, width is w and height is w-2 multiply all three.

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