document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=19884>Question 19884</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need your help with, Factoring Trinomials By Grouping, If the Trinomials cannot be factored write \"PRIME\"\r<BR>\n" );
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document.write( "7b^2-42b+56 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #9593 by </B><A HREF=/tutors/aboutme.mpl?userid=vidyamanohar><B>vidyamanohar(13)</B></A><img src=\"/images/stars/stars-06.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=vidyamanohar><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=9593\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> To factorize 7b^2-42b+56<BR>\n" );
document.write( "the coefficients we see are 7, -42 and 56<BR>\n" );
document.write( "7 is common factor of all these numbers<BR>\n" );
document.write( "we write 7b^2-42b+56=7(b^2-6b+8)<BR>\n" );
document.write( "8 can be written as the product of 4 and 2 but their sum is 6 but not -6.  So we try -4 and -2 which suits the requirement\r<BR>\n" );
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document.write( "7(b^2-6b+8)=7(b^2-4b-2b+8)=7(b-4)(b-2) </SPAN>\n" );
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