## Intermediate Algebra: Connecting Concepts through Application

36b$^2$-49 This expression is a difference of squares. If the square root of the first term is a and the square root of the second term is b, then the factorization is (a+b)(a-b). $\sqrt {36b^2}$=6b and $\sqrt {49}$=7. So the factorization is (6b+7)(6b-7).