### Home > INT3 > Chapter 3 > Lesson 3.1.1 > Problem 3-18

3-18.

What are the center and radius of each circle? Rewrite the equations if necessary. Homework Help ✎

Rewrite each equation in graphing form.

center:

radius:

Completing the square for

is necessary.center:

radius:

Complete the square for both

and.center:

radius: