CPM Homework Help : INT2 Problem 7-87

Factor each polynomial completely.

Hint:

These are both differences of squares. What is the factoring pattern for difference of squares?

Help:

$x^2 - y^2 = (x + y)(x - y)$

$36x^2 - a^2$
Hint (a):
$36x^2 - a^2 = (6x)^2 - (a)^2$
Answer (a):
$(6x + a)(6x - a)$