document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=2444>Question 2444</A>: <I><SPAN STYLE=\"word-break: break-all;\"> One dimension of a square is increased by 10 meters and the other dimension is increased by 5 meters. The area of the new rectangle is three times that of the original square. How long was one 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 #1044 by </B><A HREF=/tutors/aboutme.mpl?userid=longjonsilver><B>longjonsilver(2297)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=longjonsilver><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=longjonsilver><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=1044\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let side of square be x\r<BR>\n" );
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document.write( "so, area of square = x^2\r<BR>\n" );
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document.write( "Rectangle will have length = x+10 and width = x+5\r<BR>\n" );
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document.write( "so, area of rectangle = (x+10)(x+5)\r<BR>\n" );
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document.write( "We are told that rectangle area = 3(square area), so...\r<BR>\n" );
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document.write( "(x+10)(x+5) = 3x^2<BR>\n" );
document.write( "x^2 + 15x + 50 = 3x^2<BR>\n" );
document.write( "2x^2 - 15x - 50 = 0<BR>\n" );
document.write( "(2x + 5)(x - 10) = 0\r<BR>\n" );
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document.write( "so 2x+5=0 OR x-10=0\r<BR>\n" );
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document.write( "x=-5/2 or x=10\r<BR>\n" );
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document.write( "Physically, x=10m.\r<BR>\n" );
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document.write( "jon<BR>\n" );
document.write( " </SPAN>\n" );
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