### Home > PC > Chapter 1 > Lesson 1.3.2 > Problem 1-121

1-121.

This is the difference of two perfect squares.

(2*x* - 3*y*)(2*x* + 3*y*)

Factor out the common factors first.

Now you have a difference of two perfect squares. Factor again.

1-121.

This is the difference of two perfect squares.

(2*x* - 3*y*)(2*x* + 3*y*)

Factor out the common factors first.

Now you have a difference of two perfect squares. Factor again.