Factor 6x^2 -12x -24

Question

kainui · Answer

First off, to make it easier on yourself you might want to divide 6 out of the equation. That will make it a little more obvious. B is half the square root of C in the formula Ax^2+Bx+C

anonymous · Answer

I learned to multiply the constant (6) by the last number (-24) and then find two numbers to replace -12x with that add up to -12 and multiply to -24. Is that correct?

anonymous · Answer

you are right, but if you can take out a common factor. It would be easier to do.

kainui · Answer

You might be able to do that, I'm not familiar with that method in particular. Here's what I'd do:
Factor out the 6
$$6(x^2-2x-4)$$
Then you can approach this by either completing the square or quadratic formula, depending on what you've learned.

anonymous · Answer

With the quadratic formula i got 2 +- $$\sqrt{17}$$ is that right? And do I just ignore the 6 i took out at the beginning?