Question

A circle is centered at (2, -5) and has radius 3. Write its equation in standard form.

A) (x + 2)2 + (y - 5)2 = 3
B) (x - 2)2 + (y + 5)2 = 3
C) (x + 2)2 + (y - 5)2 = 9
D) (x - 2)2 + (y + 5)2 = 9

Answer 1

Equation of circle with center \((h, k)\) and radius \(r\).

\((x - h)^2 + (y - k)^2 = r^2\)

Answer 2

Replace x with 2, k with -5, and r with 3.
What do you get?

Answer 3

(x-2)^2+(y+5)^2=9

Answer 4

That's right :)