Question 637735
The general equation of a circle is
(x-x0)^2+(y-y0)^2 = r^2 , where (x0,y0) are the coordinates of the circle's origin and r is the radius of the circle.
Comparing your equation to the general equation of a circle leads to the conclusion that your equation is that of:
A circle with center at the origin and radius of 5 units.