document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=669140>Question 669140</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The length of a rectangular banner is 3 feet longer than its width. If the area is 70 square feet, find the dimensions. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #416171 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=416171\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">     The length of a rectangular banner is 3 feet longer than its width. If the area is 70 square feet, find the dimensions.<BR>\n" );
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document.write( "Let w = width of banner<BR>\n" );
document.write( "then<BR>\n" );
document.write( "w+3 = length of banner<BR>\n" );
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document.write( "w(w+3) = 70<BR>\n" );
document.write( "w^2+3w = 70<BR>\n" );
document.write( "w^2+3w-70 =  0<BR>\n" );
document.write( "factoring:<BR>\n" );
document.write( "(w+10)(w-7) = 0<BR>\n" );
document.write( "w = {-10, 7}<BR>\n" );
document.write( "throw out the negative solution (extraneous) leaving:<BR>\n" );
document.write( "w = 7 feet (width of banner)<BR>\n" );
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document.write( "length of banner:<BR>\n" );
document.write( "w+3 = 7+3 = 10 feet <BR>\n" );
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document.write( "answer: 7 feet by 10 feet </SPAN>\n" );
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