Find the Center and Radius of the Circle Whose Equation $x^{2}+y^{2}+12 x+8 y+52=81$

Multiple Choice

Find the center and radius of the circle whose equation is given.
- $x^{2}+y^{2}+12 x+8 y+52=81$

A) center: $(4,6)$ ; radius: 81
B) center: $(6,4)$ ; radius: 81
C) center: $(-6,-4)$ ; radius: 9
D) center: $(-4,-6)$ ; radius: 9