we know that
the equation of a circle in standard form is
(x-h)²+(y-k)²=r²
where
(h,K)----------> is the center----------> (3,5)
the radius is the distance between (3,5) and the point (4, -3)
r=√[(-3-5)²+(4-3)²]------------> r=√65 units
radius r=√65
(x-h)²+(y-k)²=r²--------> (x-3)²+(y-5)²=√65²
(x-3)²+(y-5)²=65