### Home > INT3 > Chapter 1 > Lesson 1.1.2 > Problem 1-21

1-21.

Factor each expression completely. Homework Help ✎

Find two numbers that multiply to

and add to .

There are only

terms, so factor out the greatest common factor.

Find two numbers that multiply to

and add to .

You may find a diamond helpful for this.

Notice that this is the difference of squares.