Find the center of the circle whose equation is x^2 + y^2 -10x + 12y -10 = 0
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x square+ y square - 10x+ 12y - 10 = 0
then center (-a/2,-b/2) = (5,-6)
compared that equation x square+ y square + ax+ by + c=0
then center (-a/2,-b/2) = (5,-6)
compared that equation x square+ y square + ax+ by + c=0
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