Equation of the Circle Tangent to x-axis

Find equation of circle tangent to the x-axis with center at (3,5).

The radius must be 5, so that it touches the x axis.

Hence (x - xc)^2 + (y - yc)^2 = r^2

(x - 3)^2 + (y - 5)^2 = 5^2 <<<