## College Algebra (11th Edition)

(6z + 9$y^{2}$)(6z - 9$y^{2}$)
We know that (a + b)(a - b) = $a^{2}$ - $b^{2}$, so we take the square root of each term in the polynomial to get a and b. We get 6z and 9$y^{2}$, so the factorization is (6z + 9$y^{2}$)(6z - 9$y^{2}$).