Answer to Question #90780 in Analytic Geometry for marjel

Question

find the standard equation of the circle C(3,-2) ; r=4

Answer 1

In case the center of a circle C(a;b) and the radius r, the standard form of a circle equation is (x-a)²+(y-b)²=r².

We get the equation of the circle in the form (x-3)²+(y+2)²=4² or (x-3)²+(y+2)²=16.