Question

How do you identify the center and radius of the circle `(x+9)^2+(y+1)^2=36`?

Answer 1

The centre is `(-9,-1)` and the radius is `6`.

Explanation:

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