document.write( "Question 316874: Please help me with this. Find the center and radius of the circle.
\n" ); document.write( "x square - 4x + y square - 12y + 36=0 \n" ); document.write( "

Algebra.Com's Answer #226782 by Fombitz(32388) $\"\"$ $\"About$

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Complete the square in x and y.
\n" ); document.write( " $\"x%5E2-4x%2By%5E2-12y%2B36=0\"$
\n" ); document.write( " $\"%28x%5E2-4x%2B4%29%2B%28y%5E2-12y%2B36%29%2B36=4%2B36\"$
\n" ); document.write( " $\"%28x-2%29%5E2%2B%28y-6%29%5E2=4\"$
\n" ); document.write( "Compare to the general equation for a circle centered at (h,k) with a radius R,
\n" ); document.write( " $\"%28x-h%29%5E2%2B%28y-k%29%5E2=R%5E2\"$
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\n" ); document.write( "Center:( $\"2\"$ , $\"6\"$ )
\n" ); document.write( "Radius: $\"2\"$
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