Home > CCA2 > Chapter 3 > Lesson 3.2.5 > Problem 3-126
3-126.
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.