document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=771429>Question 771429</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the center of a circle using this equation x^2+y^2-10x-10y+25=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #470252 by </B><A HREF=/tutors/aboutme.mpl?userid=Cromlix><B>Cromlix(4381)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Cromlix><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Cromlix><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=470252\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The general equation of a circle<BR>\n" );
document.write( "= x^2 + y^2 + 2gx + 2fy + c = 0<BR>\n" );
document.write( "Centre = (-g,-f)<BR>\n" );
document.write( "Therefore the equation of the circle:<BR>\n" );
document.write( "x^2 + y^2 - 10x - 10y + 25 = 0<BR>\n" );
document.write( "has (5,5) as the coordinates of its<BR>\n" );
document.write( "centre.<BR>\n" );
document.write( "Radius = square root of(g^2 + f^2 - c)<BR>\n" );
document.write( "Square root of (5^2 + 5^2 - 25)<BR>\n" );
document.write( "Square root of 25 + 25 - 25)<BR>\n" );
document.write( "Square root of 25<BR>\n" );
document.write( "= 5 units<BR>\n" );
document.write( "Hope this helps.<BR>\n" );
document.write( ":-) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );