document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=414893>Question 414893</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve this equation by completing the square -4r^2+21r=r+13\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #290943 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=290943\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> solve this equation by completing the square <BR>\n" );
document.write( "-4r^2+21r=r+13<BR>\n" );
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document.write( "-4r^2 + 20r - 13 = 0<BR>\n" );
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document.write( "r = [-20 +- sqrt(400 -4*-4*-13)]/(2*-4)<BR>\n" );
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document.write( "r = [-20 +- sqrt(192)]/(-8)<BR>\n" );
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document.write( "r = [-20 +- 8sqrt(2)]/(-8)<BR>\n" );
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document.write( "r = (5/2) +- sqrt(2)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "stan H. \r<BR>\n" );
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