Since we've already factored the 3 x out, we want to work with this trinomial.
This top number should be a times c. A is the coefficient in front of x squared
and c is our constant term. So 12 times negative 2 equals negative 24, this
choice. The bottom number is the b or the coefficient in front of x, so negative
5. Great work if you found these two numbers. I know this question was tricky,
since I threw another polynomial at you. But, we want to make sure we work with
factoring this quadratic.