document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=617304>Question 617304</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the radius of a circle given by the following equation:\r<BR>\n" );
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document.write( "x^2 + y^2 + 2x + 4y + 4 = 0\r<BR>\n" );
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document.write( "I know the answer (r=1), but I want to understand the steps to arrive at the solution.\r<BR>\n" );
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document.write( "Thank you! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #388260 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=388260\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the general circle equation is ___ (x - h)^2 + (y - k)^2 = r^2 ___ this is a circle centered at (h,k) with radius r\r<BR>\n" );
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document.write( "put the given equation into general form by completing the squares\r<BR>\n" );
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document.write( "x^2 + 2x + y^2 + 4y = -4\r<BR>\n" );
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document.write( "x^2 + 2x + (2/2)^2 + y^2 + 4y + (4/2)^2 = -4 + (2/2)^2 + (4/2)^2\r<BR>\n" );
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document.write( "(x + 1)^2 + (y + 2)^2 = 1 </SPAN>\n" );
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