Question

what is the equation of a circle with a center at (-2,3) and a radius of 4

Answer 1

You have to plug it into the equation r^2 = (x-h)^2 + (y-K)^2
Where r is the radius and the point (h,k) being the center of the circle
So it would look like:
(4)^2 = [x-(-2)]^2 + [y-(3)]^2
Then simplify the equation

Answer 2

explanation was good, but a little heavy on the 'doing all the work' part and not enough 'encouraging asker participation'. all in all could use some improvement.