document.write( "Question 505281: I am trying to determine if this equation is a circle and give center and radius. I know it is a circle because x and y have equal coefficients and I know the formula but I can't figure how to set it up. Equation is: x^2+y^2-12x+10y = -25. Thank you \n" ); document.write( "
Algebra.Com's Answer #339836 by nerdybill(7384)\"\" \"About 
You can put this solution on YOUR website!
equation of a circle:
\n" ); document.write( "(x - h)^2 + (y - k)^2 = r^2
\n" ); document.write( ".
\n" ); document.write( "For your problem:
\n" ); document.write( "x^2+y^2-12x+10y = -25
\n" ); document.write( "group x's and y's:
\n" ); document.write( "(x^2-12x)+(y^2+10y) = -25
\n" ); document.write( "complete the squares:
\n" ); document.write( "(x^2-12x+36)+(y^2+10y+25) = -25+36+25
\n" ); document.write( "(x-6)^2+(y+5)^2 = 36
\n" ); document.write( "(x-6)^2+(y+5)^2 = 6^2
\n" ); document.write( ".
\n" ); document.write( "Center: (6,5)
\n" ); document.write( "Radius: 6\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
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