Question

What is the center of the circle represented by
the equation x² + (y + 9)2 = 25 ?

Answer 1

(0,-9)

Explanation:

The equation of a circle is written in the form

(x-h)^2 + (y-k)^2 = r^2 where (h,k) is the center and r is the radius

Rewriting

x² + (y + 9)^2 = 25

(x-0)² + (y - - 9)^2 = 5^2

We find the center is (0,-9) and the radius is 5