Question

Solve. 3x2 + 6x = 8?

Answer 1

is that 3x squared?

Answer 2

The answers are in quadratic formula form, so the quadratic formula needs to be used to solve this. I dont want to cheat, I just need help...Im confused.
What I did:
subtracted 8 from both sides to get all terms on one side.
plugged the numbers into the q-formula, as a=3, b=6, and c=8.
I worked it down to x=-6 +/- radical 132 /6...and now Im stuck. I dont know if I did anything wrong ir what to do next...Please help?

Answer 3

Yes, it is 3x squared.

Answer 4

you subtracted 8 from both sides...that means c = -8 not positive

Answer 5

Oh yeah, I did the problem that way...I just wrote it wrong here. In the radical negative 8 is multiplied by 3 and negative 4, which get's 132 in the radical.

Answer 6

Write the equation as
\[
3 x^2 + 6 x - 8 == 0
\]
Use the quadratic formula to find
\[
x_1=\frac{1}{3} \left(-3-\sqrt{33}\right)\\

x_2=\frac{1}{3} \left(-3 +\sqrt{33}\right)
\]

Answer 7

When\[ b=2 b'\] , the quadratic formul simplifies
to
\[
a=\frac {-b' \pm \sqrt{b'^2 - ac} }
{a}
\]

Answer 8

the last line a should be x