Question

HELP PLEASE Find the center and radius of the circle.

x2 + 8x + y2 − 2y − 8 = 0

The center is , and the radius is

Answer 1

r = 5

Explanation:

Answer 2

Centre: (-4,1)

Radius: 5

Explanation:

h = -8/2 = -4

k = -(-2)/2 = 1

(-4)² + 1² - (-8) = r²

r² = 25

r = 5