Okay, here we have this:
(x-a)²+(y-b)²=r² is the equation of the circle with radius r and with center at (a, b), then: We are going to rewrite the equation to the form of the ordinary equation of the circumference:
(x-3)²+(y-(-1))²=5²
Therefore the properties of the circle are:
(a,b)=(3,-1) and r=5.