document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=225901>Question 225901</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Decide whether of not the equation has a circle as its graph. Give the center and the radius.<BR>\n" );
document.write( "4x^2+4y^2+4x-4y-7=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #168379 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=168379\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 4x^2+4y^2+4x-4y-7<BR>\n" );
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document.write( "Complete the square for x and y:<BR>\n" );
document.write( "4x^2 + 4x + 1 + 4y^2 - 4y + 1 = 7 + 1 + 1<BR>\n" );
document.write( "x^2 + 1 + 1/4 + y^2 - y + 1/4 = 9/4<BR>\n" );
document.write( "(x+1/2)^2 + (y-1/2)^2 = (3/2)^2<BR>\n" );
document.write( "--> A circle, center at (-1/2,1/2), radius 3/2<BR>\n" );
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