### Home > PC > Chapter 2 > Lesson 2.2.1 > Problem 2-40

2-40.

Factor each expression. Homework Help ✎

*x*^{4}− 81*y*^{4}8

*x*^{3}+ 2*x*^{7}

This is the difference of two perfect squares.

Factor out the greatest common factor first.Then see if you can factor again.