Question 316874
Complete the square in x and y.
{{{x^2-4x+y^2-12y+36=0}}}
{{{(x^2-4x+4)+(y^2-12y+36)+36=4+36}}}
{{{(x-2)^2+(y-6)^2=4}}}
Compare to the general equation for a circle centered at (h,k) with a radius R,
{{{(x-h)^2+(y-k)^2=R^2}}}
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Center:({{{2}}},{{{6}}})
Radius: {{{2}}}