document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1031094>Question 1031094</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a room each wall is x feet. If you extend the room by 15 ft each way, the new area of the room is 900 ft. What was the original lengths of the walls? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #645804 by </B><A HREF=/tutors/aboutme.mpl?userid=LinnW><B>LinnW(1048)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=LinnW><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=LinnW><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=645804\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Set x = the original wall length<BR>\n" );
document.write( "Each wall in the extended room is ( x + 15 )<BR>\n" );
document.write( "So the area is ( x + 15 )( x + 15 )<BR>\n" );
document.write( "( x + 15 )( x + 15 ) = 900<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2+%2B+30x+%2B+225+=+900 ALIGN=MIDDLE  ALT=\"x%5E2+%2B+30x+%2B+225+=+900\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "add -900 to each side<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2+%2B+30x+-+675+=+0 ALIGN=MIDDLE  ALT=\"x%5E2+%2B+30x+-+675+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Factoring<BR>\n" );
document.write( "(x + 45)(x - 15) = 0<BR>\n" );
document.write( "So x = -45 or x = 15<BR>\n" );
document.write( "We cannot have a negative length,<BR>\n" );
document.write( "so the original length is 15<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );