Factor Polynomial: Difference of Squares

I work through 4 problems to show how to factor a difference of squares. Then I work through 2 more to show that factoring a difference of terms raised to the fourth power may require an additional step of factoring. Factoring a difference of squares allows me to finish describing the "Rules for Factoring," that I have been developing through the previous several videos. The Rules provides a student with some guidance on how to approach the wide variety of factoring problems encountered.