Verified answer

The center is opposite of what is inside the parentheses. If you have (x+2)^2, then your x coordinate will be -2 while (y-9)^2 has a y coordinate of 9.

So your center is (-2,9).

On the other hand, you just square root 16 and your radius will be 4.

You simply need to glance at the equation.

Centre: (-2, 9)

Radius: √16 = 4