### Home > INT3 > Chapter 8 > Lesson 8.1.1 > Problem 8-15

8-15.

What are 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

The roots are the *x*-intercepts on the graph of the function.

*x* = 3

*x* is a common factor.

See part (a).