Answer
(3x-2)(6x+7)
Work Step by Step
Given the polynomial
$18x^{2}$ + 9x -14
*** We break of the middle term into two factors that add to give +9 and multiply to give -252. The two numbers are +21 and -12.
$18x^{2}$ + 21x - 12x -14
We take the GCD of the first two and the GCD of the last two terms.
6x(3x-2) + 7(3x-2)
We take (3x-2) and factor it out which gives us.
(3x-2)(6x+7)