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anonymous
 one year ago
Which of the following is a solution of x2 + 4x + 6?
−2 + i times the square root of 2
2 + i times the square root of 2
−2 + three i times the square root of 2
−2 + three i times the square root of 2
anonymous
 one year ago
Which of the following is a solution of x2 + 4x + 6? −2 + i times the square root of 2 2 + i times the square root of 2 −2 + three i times the square root of 2 −2 + three i times the square root of 2

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you have a choice you can use the quadratic formula or you can complete the square you pick

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0actually there is a third choice, namely to cheat

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0how do i do that, any of it ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0do you know the quadratic formula?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the solutions to \[ax^2+bx+c=0\] are \[x=\frac{b\pm\sqrt{b^24ac}}{2a}\] in your case \(a=1,b=4,c=6\) but also in your case completing the square is easier

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0lets solve \[x^2+4x+6=0\] by completing the square ready?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0sorry i was working it out xD

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so far I got dw:1438546685018:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[4^24\times 6=8\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[x=\frac{4\pm\sqrt{8}}{2}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0then \[\sqrt{8}=\sqrt{4\times 2\times (1)}=\sqrt{4}\sqrt{2}\sqrt{1}=2\sqrt{2}i\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0giving you \[\frac{4\pm2\sqrt{2}i}{2}\] divide each term by \(2\) and get \[2\pm\sqrt{2}i\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0it would have been easier to complete the square there would have been no denominator

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is that supposed to be the answer ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0lol yes it is "supposed to be" but in fact they wrote \[2\pm i\sqrt{2}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0xD are you able to help me out with more ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Solve x2 + 4x + 1 = 0. x equals the quantity of 4 plus or minus square root 12 all over 2 x equals negative 4 plus or minus square root 3 x equals negative 2 plus or minus square root 3 x equals the quantity of 4 plus or minus square root 13 all over 2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0lets complete the square for this one, unless you want to use the formula again

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0in fact i will just write down the steps for completing the square without skipping any so you can try one on your own

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[x^2+4x=1=0\] subtract 1 from both sides get \[x^2+4x=1\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0then half of 4 is 2, and 2 squared is 4 go right to \[(x+2)^2=1+4\] or \[(x+2)^2=3\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0take the square root of both sides, don't forget the \(\pm\) get \[x+2=\pm\sqrt3\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0subtract 2 from both sides to solve for x, get \[x=2\pm\sqrt3\] done

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0looks like option C in your choices

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0xD I thought I wa supposed to do it lol

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Solve 6 over x minus 4 equals 4 over x for x and determine if the solution is extraneous or not. x = 8, extraneous x = 8, nonextraneous x = 8, extraneous x = 8, nonextraneous what about this one xD

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0this is not a quadratic i guess

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\frac{x}{x4}=\frac{4}{x}\] right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no that is not right \[\frac{6}{x4}=\frac{4}{x}\] hows that?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the x in the numerator is a 6

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0as the math teacher say "cross multiply" and get \[6x=4(x4)\] which is a linear equation can you solve that one?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0would it be extraneous?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0how do i tell if its extraneous or nonextraneous?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0if it does not make the denominator zero, then it is not extraneous or put another way, if it does make the denominator zero, then it is extraneous

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0in this case it does not, so it is not extraneous

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\frac{6}{x4}=\frac{4}{x}\] sustitute \(x=8\) get \[\frac{6}{84}=\frac{4}{8}\] or \[2=2\] a perfectly good solution

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0well actually \[\frac{1}{2}=\frac{1}{2}\] but you get the idea

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you up for some more xD? Or you tired out?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0What is the axis of symmetry for f(x) = 2x2 + 8x + 8? x = −2 x = −4 x = 4 x = 2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oops axis of symmetry of \(y=ax^2+bx+c\) is \[\frac{b}{2a}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0in your case \(a=2,b=8\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0let me know when you get \[x=2\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0c in your case is 8 but it does not figure in to the axis of symmetry it is just \[x=\frac{b}{2a}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no there is a minus sign in the formula

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[x=\frac{8}{2\times 2}\\ x=2\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0What is the standard form equation of the line shown below? −3x + 2y = 5 3x − 2y = −5 y − 4 = three halves(x − 1) y = three halvesx + five halves

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you need the slope first you know how to find it?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0that is the "slope intercept" form not standard form but in any case you need \(m\) (the slope) first

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what is the standard form again ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0standard form will be one of your first two choices \[ax+by=c \]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0im not understanding how i would use it

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0in fact we don't have to do any work at all for this one since only choice B is in standard form just pick that one and move on

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Simplify open parentheses x to the 2 fifths power close parentheses to the 5 sixths power. x to the 37 over 30 power x to the 13 over 30 power x to the 10 elevenths power x to the 1 third power

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i really appreciate you helping me <3

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\huge (b^m)^n=b^{m\times n}\] is what you need for this one, i.e.multiply the exponents

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so what would the b be?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0multiply \[\frac{2}{5}\times \frac{5}{6}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0in this case \(b\) is \(2\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0do i cross multiply?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\huge (2^{\frac{2}{5}})^{\frac{5}{6}}\] \[\huge 2^{\frac{2}{5}\times \frac{5}{6}}\] hell no

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0multiply just means multiply

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so\[\frac{ 10 }{ 30 }\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\frac{2}{5}\times \frac{5}{6}\] we can cancel stuff too

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\frac{2}{\cancel{5}}\times \frac{\cancel{5}}{6}=\frac{2}{6}\] is a start

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0then you can cancel the 2 as well

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0or you could cancel here \[\frac{1\cancel{0}}{3\cancel{0}}=\frac{1}{3}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0either way you get \(\frac{1}{3}\) and also you do NOT cross multiply

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok gotcha cx makes more sense now

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0whew final answer \[\huge 2^{\frac{1}{3}}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0What is the simplified form of the quantity 12 zsquared minus 7z minus 12 over the quantity 3 zsquared plus 2z minus 8 ? 4z plus 3 over z plus 2 4z minus 3 over z plus 2 4z plus 3 over z minus 2 4z minus 3 over z minus 2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0wait wouldnt it be x1/3

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\frac{12z^27z12}{3z^2+2z8}\] factor and cancel

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0hold on let me go back and look

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeah sorry \[\huge x^{\frac{1}{3}}\] the base was x, not 2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0for the last one you have to factor and cancel i suck at factoring, but i am good at cheating http://www.wolframalpha.com/input/?i= \frac{12z^27z12}{3z^2%2B2z8}

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i dont understand how to use that xD

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0this will work better http://www.wolframalpha.com/input/?i=%2812z^27z12%29%2F%283z^2%2B2z8%29 apparently it is \[\frac{4z+3}{z+2}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0click on the link to the second one and see how i wrote it in wolfram

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0questions are all over the map must be an on line course ...

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0What is the simplified form of the seventh root of x times the seventh root of x times the seventh root of x times the seventh root of x? this one would be \[\sqrt[7]{4x}\] right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and oh i thought it was

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0one answer is \[x^{\frac{4}{7}}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0another is \[\sqrt[7]{x^4}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the power is four, not the coefficient

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[x\times x\times x\times x=x^4\]not \(4x\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.04 times the seventh root of x x to the foursevenths power the seventh root of 4x x to the seven fourths power

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thes are the answers

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\huge \sqrt[7]{x^4}=x^{\frac{4}{7}}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Which of the following represents the zeros of f(x) = 6x3 + 25x2  24x + 5? 5, one third, one half 5, one third, one half 5, one third,  one half 5, one third, one half

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0cheat like crazy for this one

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0http://www.wolframalpha.com/input/?i=+6x3+%2B+25x2++24x+%2B+5%3D0

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\{5,\frac{1}{2},\frac{1}{3}\}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0otherwise you have to figure out that it factors as \[(3 x1) (2 x1) (x+5)\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Use the graph below for this question: What is the average rate of change from x = −1 to x = −2?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0although the question is confusing since it says "from 1 to 2" which is backwards

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0maybe they want you to say 2, i am not clear on that the question is ill posed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0not uncommon for an on line class btw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0sorry i was talking to my brother

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i gotta run now good luck with the rest keep posting in a new thread, i am sure you will get lots of answers

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thank you so much!!!
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