### Home > A2C > Chapter 9 > Lesson 9.1.1 > Problem 9-20

9-20.

Find the

**roots**(the solutions when*y*= 0) of each of the following polynomial functions. Homework Help ✎*y*=*x*^{2}− 6*x*+ 8*f*(*x*) =*x*^{2}− 6*x*+ 9*y*=*x*^{3}− 4*x*

Factor the right side and use the Zero Product Property.

*x* = 2, *x* = 4

See part (a).

*x* = 3

See part (a).

*x* is a common factor.