### Home > PC > Chapter 7 > Lesson 7.2.4 > Problem 7-81

7-81.

Complete the square (if necessary) to find the center and radius of the circle. Then sketch the graph.

Regroup with

and*y*'s together and the constant on the other side.Complete the square finding the ?'s and adding the same amount on both sides.

Simplify and graph.

Follow the same thinking process as part (a).