Using the method of completing the square, put each circle into the form

then determine the center and radius of each circle

ANSWER

Center; (-4,3)

Radius: r=3

EXPLANATION

The given circle has equation;

Rewrite to obtain;

Regroup to obtain;

Add the square of half the coefficient of the linear terms to both sides of the equation,

This simplifies to;

By comparison;

and the radius is