Question

The equation of a circle is shown below.

(x -5)^2 + (y + 2)^2 = 64

The radius of the circle is how many units?

Answer 1

64 = 8^2

radius is 8

Answer 2

\[(x-5)^{2}+(y+2)^{2} = 8^{2}\]
this means the circle is centered around (5,-2) and has radius 8.