Question

How would I find the center and radius for: x^2+(y+4)^2=9

Answer 1

The general equation of a circle has the form
\((x - h)^2 + (y - k)^2 = r^2\) where \((h,k)\) is the center of the circle and \(r\) is the radius.

Answer 2

what if there is no h?

Answer 3

(x - 0)^2 = x^2

h is an implied zero

Answer 4

ok and does 9 have to be a square root?