document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=43761>Question 43761</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the center and radius of the circle: x^2 + y^2 - 6x + 8y + 21 = 0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #28742 by </B><A HREF=/tutors/aboutme.mpl?userid=Nate><B>Nate(3500)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Nate><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=28742\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x^2 + y^2 - 6x + 8y + 21 = 0<BR>\n" );
document.write( "(x^2 - 6x) + (y^2 + 8y) = -21<BR>\n" );
document.write( "(x - 3)^2 + (y + 4)^2 = -21 + 16 + 9<BR>\n" );
document.write( "(x - 3)^2 + (y + 4)^2 = 4<BR>\n" );
document.write( "C(3,-4)<BR>\n" );
document.write( "radius = 2 units </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );