Answer
$(x-2)^2 + (y+5)^2=6^2$
center: $(2,-5)$ $\qquad$ radius: $6$
Work Step by Step
$x^2 -4x+y^2+10y-7=0$
$(x^2-4x \textbf{+4}) + (y^2+10y \textbf{+25})=7 \textbf{+4+25}$
$(x-2)^2 + (y+5)^2=36$
center: $(2,-5)$ $\qquad$ radius: $6$
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