### Home > CCA2 > Chapter 5 > Lesson 5.2.3 > Problem 5-91

5-91.

Factor each expression below. Homework Help ✎

Look for a greatest common factor.

This is the difference of squares:

If you need more help, look up difference of squares in the glossary or find your class work from Lesson 3.1.2.

Always start by looking for a greatest common factor.

Can you factor the polynomial further?

Use a generic rectangle. Remember that the products of the diagonals must be equal.

Start by filling in the first and last terms.

What two numbers multiply to

and add to ? Find the greatest common factor for each row and column.