Question

If the equation of a circle is (x+5)2+(x-7)2=
36, its radius is

Answer 1

I checked everything is correct it’s 6

Answer 2

6

Explanation:

The equation for a circle is (x-h)^2 +(y-k)^2 = r^2

where (h,k) is the center of the circle and r is the radius

(x+5)^2+(y-7)^2= 36

Rewriting

(x+5)^2+(y-7)^2=6^2

The center is at (-5,7) and the radius is 6