How do you solve(3x+1)²- (x-2)²
factorization a²b+ab+ab²-a-b-1

I believe the answer is

First thing's first:  Square both of the parentheses, I'm going to use the FOIL method, if you use a different method, go for it:



Now distribute the to the second parentheses to make it a plus sign:



Now combine like factors to simplify:



So that should be your final answer if I understand the question correctly.