# Thread: Another Question, regarding Quadratic Formula??

1. ## Another Question, regarding Quadratic Formula??

Attachment 3275
Is it correct to use the quadratic formula for this derivative of this? I am not getting the right answer of 2+- 2sqroot3

Help would be much appreciated.

2. ## Re: Another Question, regarding Quadratic Formula??

Make sure you get the right signs for $a$, $b$ and $c$. This should give:

$x=\frac{-12\pm\sqrt{144+(4)(3)(12)}}{-6}$

$x=2\pm2\sqrt{2}$