document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=836155>Question 836155</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi, \r<BR>\n" );
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document.write( "Please can any one help with the following? Many thanks. Hugh\r<BR>\n" );
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document.write( "Factorise the following expressions.\r<BR>\n" );
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document.write( "(i) x^2 &#8722; x &#8722; 42 \r<BR>\n" );
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document.write( "(ii) 9m^2 &#8722; 81n^2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #504012 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=504012\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (ii) is the difference of squares.  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%283m%2B9n%29%283m-9n%29 ALIGN=MIDDLE  ALT=\"%283m%2B9n%29%283m-9n%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "(i) Look for factors of 42 which could be arranged as sum or difference to give -1.  Obvious choice is 6 and 7, but which signs? For the -42, one be negative and other be positive.  For the -x, you want 6-7:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%2B6%29%28x-7%29 ALIGN=MIDDLE  ALT=\"%28x%2B6%29%28x-7%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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