Find the center and radius of the circle.
-$$( x - 4 ) ^ { 2 } + ( y + 2 ) ^ { 2 } = 9$$
A) $( - 4,2 ) , r = 9$
B) $( 2 , - 4 ) , r = 9$
C) $( - 2,4 ) , \mathrm { r } = 3$
D) $( 4 , - 2 ) , r = 3$

Question

Quizplus · Accepted Answer

The equation of a circle in the form $(x - h)^2 + (y - k)^2 = r^2$ has a center at $(h, k)$ and a radius $r$. For the given equation, the center is $(4, -2)$ and the radius is $\sqrt{9} = 3$.

Find the Center and Radius of the Circle (x−4)2+(y+2)2=9( x - 4 ) ^ { 2 } + ( y + 2 ) ^ { 2 } = 9(x−4)2+(y+2)2=9

Find the Center and Radius of the Circle $( x - 4 ) ^ { 2 } + ( y + 2 ) ^ { 2 } = 9$