Find the center of the radius
(x+2)^2 +y^2=64
The standard equation of a circle is
(x-h)^2+(y-k)^2 = r^2
where the centre is at (h,k) and radius r.
The given equation can be rewritten as:
(x-(-2))^2 + (y-0)^2 = 8^2
Compare the above equation with the standard equation to find the centre and radius of the given circle.