document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=888283>Question 888283</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the sides of the square are extended to form a rectangle. one side of the square is extended by 5 cm and the other side by 2 cm. the area of the rectangle is 130 cm². Find the length at the side of the square.<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 #537316 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=537316\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let x be the length of a side of the square, then<BR>\n" );
document.write( "130 = (x+5) * (x+2)<BR>\n" );
document.write( "130 = x^2 +7x +10<BR>\n" );
document.write( "x^2 +7x -120 = 0<BR>\n" );
document.write( "factor the polynomial<BR>\n" );
document.write( "(x+15)*(x-8) = 0<BR>\n" );
document.write( "x = -15 or x = 8<BR>\n" );
document.write( "we want the positive value for x<BR>\n" );
document.write( "therefore, the length of a side of the square is 8 cm<BR>\n" );
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