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Mathematics 20 Online
OpenStudy (anonymous):

3x^2=-8x-2

OpenStudy (anonymous):

Just need some help getting it to =0

OpenStudy (anonymous):

3^2+8x+2=0 ?

OpenStudy (anonymous):

ok, will work it and see if I come up with the right answer...

OpenStudy (anonymous):

nope, getting - in the square root...

OpenStudy (anonymous):

\[3x ^{2}=-8x -2\] \[3x ^{2}+8x =-2\] - We added 8x to each side \[3x ^{2}+8x +2=0\] We added 2 to each side

OpenStudy (anonymous):

This is a trinomial that will need to be factored to solve for x.

OpenStudy (anonymous):

factored, so the quadratic formula will not work?

OpenStudy (abb0t):

product = 6 but sum = 8 if u cant find one, use quadratic formula, which is \( \pm \frac{-b \pm\sqrt{b^2-4ac}}{2a}\) where you have \(ax^2+bx+c=0\)

OpenStudy (anonymous):

Yes, you will need to use the quadratic formula for this.

OpenStudy (anonymous):

I'm getting -8 +/- square root -24 divide by 6

OpenStudy (anonymous):

Where, A=3 B=8 C=2 B^2 is 63, 4AC is 4(3)(2) or 24, so 64-24 is 40 You should have "40" under the radical.

OpenStudy (anonymous):

Sorry, b^2 is 64, not 63

OpenStudy (anonymous):

got it, thank you! simple error on my part.

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