Center: $(-2,0)$; Radius: $r=4$
Work Step by Step
Equation of a circle: $(x-h)^2+(y-k)^2=r^2~~ $ (standard form) Center: $(h,k)$; Radius: $r$ $(x+2)^2+y^2=16$ $[x-(-2)]^2+(y-0)^2=4^2$ $h=-2$, $k=0$, $r=4$
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