Question

-3x^2 - 5x +12 = 0

How to solve for x?

Answer 1

quadratic formula will do it.
do you know it?

Answer 2

I do but I am getting the wrong answer for some reason?

Answer 3

\[-b \pm \sqrt{b ^{2}-4ac}/2a\]
a = -2
b = -5
c = 12

Answer 4

you should get two possible values for x

Answer 5

actually a = -3

Answer 6

I will try it again.

Answer 7

miss-keyed

Answer 8

\[x=\frac{5\pm\sqrt{3^2-4\times -3\times 12}}{2\times -3}\] is a start

Answer 9

yeah i make typos all day and it is a pain to rewrite!

Answer 10

\[x=\frac{5\pm\sqrt{9+144}}{-6}\]
\[x=\frac{5\pm\sqrt{153}}{-6}\]

Answer 11

or if you prefer
\[x=\frac{-5\pm\sqrt{153}}{6}\]

Answer 12

What would i do after that step?

Answer 13

this is the point where i screw up

Answer 14

\[x = (-5\pm 12.369)/ 6\]

Answer 15

what is the final answer supposed to be because according to my answer sheet it is x= 4/3