Question

Write the standard form of the equation of the circle with radius r and center (h,k)

r=5 (h,k)= (-3,4)

Answer 1

The answer is
x^2 + y^2 = 9

Answer 2

x2 + y2 = 9.

Explanation:

The equation is (x-h)2 + (y-k)2 = r2

So, if the center is (0,0) and the radius is 3, the equation is:

(x-0)2 + (y-0)2 = 32, which simplifies to x2 + y2 = 9.