Answer
(3x + 8)(3x + 4)
Work Step by Step
With this problem, it is easiest to pretend that the 3x + 2 term is actually just x, and at the end of the problem substitute the 3x + 2 back into the equation. First you find factors of 12 that sum to 8, which are 6 and 2. This gives the binomial expressions (x + 6)(x + 2). Now substituting the 3x + 2 back into the equation gives:
(3x + 2 + 6)(3x + 2 + 2) = (3x + 8)(3x + 4)
