### Home > INT3 > Chapter 2 > Lesson 2.2.4 > Problem 2-106

2-106.

Factor each expression completely.

This is a difference of two squares.

If you don't know the pattern for difference of two squares yet, use a generic rectangle to help you.

is a common factor. Factor it out. What is left is a difference of two squares, as in part (a). Factor again.

You can use an area model.

The common factor is

.After you factor out

you have to factor a second time.