Question

the circle is centered at the point 2, 6 and the length of its radius is 4 what is the equation of the circle

Answer 1

(x - 2)^2 + (y - 6)^2 = 4^2
Equation of circle is (x – h)2 + (y – k)2 = r2

Answer 2

it would be (x-2)+(y-6)=(4)^2
so (x-2)+(y-6)=16

because the equation of a circle where the points aren't zero is (x-h)+(y-k)=r^2 with h and k being your center points.