Question

Write and equation of the circle with center (7,-5) and radius of 6.

Answer 1

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

Explanation:

(x - h)^2 + (y - k)^2 = r^2 is the standard form, with center (h, k) and radius r.

So our circle must have a center h = 7 and k = +5 The radius is 6 so r^2 = 36.

Answer 2

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