document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=751358>Question 751358</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I don't understand how to factor this problem:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2a%5E2-9a-18 ALIGN=MIDDLE  ALT=\"2a%5E2-9a-18\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #457134 by </B><A HREF=/tutors/aboutme.mpl?userid=FrankM><B>FrankM(1040)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=FrankM><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=FrankM><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=457134\">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=2a%5E2-9a-18 ALIGN=MIDDLE  ALT=\"2a%5E2-9a-18\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "These problems take a bit of trial and error. \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282a%2B2%29%28a-9%29=+2a%5E2-16a-18 ALIGN=MIDDLE  ALT=\"%282a%2B2%29%28a-9%29=+2a%5E2-16a-18\"   DISABLED_style= \"max-width:90%; height:auto;\" >  I got the first and last term but we need the middle term to work. \r<BR>\n" );
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document.write( "The 2 has just the two factors, 2 and 1, but 18 has these pairs,(18,1)(9,2)(6,3) along with the choice of where the negative sign goes. \r<BR>\n" );
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document.write( "Turns out this is the correct result -\r<BR>\n" );
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