document.write( "Question 136431: find the center and radius of the circle given by:
\n" ); document.write( "x^2+10x+y^2+12y=-12
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Algebra.Com's Answer #100002 by scott8148(6628)\"\" \"About 
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complete the squares for x and y\r
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\n" ); document.write( "\n" ); document.write( "adding (10/2)^2 and (12/2)^2 __ x^2+10x+25+y^2+12y+36=-12+25+36\r
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\n" ); document.write( "\n" ); document.write( "(x+5)^2+(y+6)^2=7^2\r
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\n" ); document.write( "\n" ); document.write( "the circle is centered at (-5,-6) with a radius of 7
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