Consider the circle with the equation $$(x+2)^2 + (y-1)^2 = 25.$$ Its center is
$($ $,$ $)$
and its radius is $r=$ .
Hint: The circle with radius $r$ and center $(x_C,y_C)$ is the set of all points that are at a distance $r$ from the center. It is the graph of the equation $$(x-x_C)^2+(y-y_C)^2 = r^2.$$