Answer
Center: $(-8,-1)$
Radius: $r=12$
Work Step by Step
The equation of a circle in standard form:
$(x-h)^2+(y-k)^2=r^2$ in which $(h,k)$ is the center and $r$ is the radius
$(x+8)^2+(y+1)^2=144$
$[x-(-8)]^2+[y-(-1)]^2=12^2$
Center: $(-8,-1)$
Radius: $r=12$
