Geometry question , any is appreciated!

(x+1)^2 + (y-1)^2 = 64
can be written into
(x-(-1))^2 + (y-1)^2 = 8^2

The second equation mentioned above is in the form
(x-h)^2 + (y-k)^2 = r^2
which is the general equation for circles

We see that,
center = (h,k) = (-1,1)
radius = r = 8

D

C, e, and a (hope it )