document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=34805>Question 34805</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Well, in class, we were doing Factoring by grouping. I really hope you know what that means, because I'm having a hard time typing up an example problem. So I'll just leave it up to you. \r<BR>\n" );
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document.write( "ab + 7b - 3a-21\r<BR>\n" );
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document.write( "Thank you in advance =) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #21032 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=21032\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Typically, if the question asks you to factorise by grouping, then it will be possible to do it... that is the first thing to remember :-)\r<BR>\n" );
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document.write( "ab + 7b - 3a - 21 --> typical set of terms: all different and what  the hell are the factors? etc\r<BR>\n" );
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document.write( "well pick 2 terms that you can factorise: <BR>\n" );
document.write( "how about ab and 7b? --> b(a+7)<BR>\n" );
document.write( "and also -3a - 21 --> -3(a+7)<BR>\n" );
document.write( "Voila...a like term, so:\r<BR>\n" );
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document.write( "ab + 7b - 3a - 21<BR>\n" );
document.write( "b(a+7) -3(a+7)\r<BR>\n" );
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document.write( "Now we have 2 terms both of which have a (a+7) which can be factored out, leaving:<BR>\n" );
document.write( "(a+7)(b-3)\r<BR>\n" );
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document.write( "jon. </SPAN>\n" );
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