Question

Find center and radius of this circle:

`(x-2)^2+(x+12)^2=81`

Answer 1

center: (2,-12)

radius: 9

Explanation:

(x-h)^2+(y-k)^2=r^2

h=2

k=-12

r=9

Answer 2

center: (2,-12)

radius: 9

Explanation:

`(x-h)^2+(y-k)^2=r^2`

`h=2\\k=-12\\r=9`

get r by getting square root of 81

center = (h,k)