What are the coordinates of the center and the measure of the radius for a circle whose equation is (x+9)^(2) + (y+4)^(2) = 81

Question

What are the coordinates of the center and the measure of the radius for a circle whose equation is
`(x+9)^(2) + (y+4)^(2) = 81`

Answer 1

Centre= (-9,-4)

Radius = 9 units