document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=457906>Question 457906</A>: <I><SPAN STYLE=\"word-break: break-all;\"> PLEASE HELP!!<BR>\n" );
document.write( "Set up an equation and solve the following problem. <BR>\n" );
document.write( "Suppose that the area of a square is twenty-one times its perimeter. Find the length of a side of the square. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #314100 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=314100\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A+=+s%5E2+=+21%2AP+=+21%2A%284s%29 ALIGN=MIDDLE  ALT=\"A+=+s%5E2+=+21%2AP+=+21%2A%284s%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > ==> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s%5E2+=+84s ALIGN=MIDDLE  ALT=\"s%5E2+=+84s\"   DISABLED_style= \"max-width:90%; height:auto;\" > ==> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s%5E2+-+84s+=+0 ALIGN=MIDDLE  ALT=\"s%5E2+-+84s+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<==> s(s - 84) = 0 ==> s = 0 or s = 84.  Hence the length of a side of the square is 84. </SPAN>\n" );
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