Posted by Mountain Scott on Friday, August 24, 2012 at 3:39pm.
x^2 -12 x = -y^2 + 4 y -36
x^2 -12 y + 36 = -y^2 + 4 y
-(x-6)^2 = y^2-4y
-(x-6)^2 + 4 = y^2 - 4 y + 4
-(x-6)^2 + 4 = (y-2)^2
(x-6)^2 + (y-2)^2 = 4
center at (6,2) radius 2
you do the rest
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