document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=562202>Question 562202</A>: <I><SPAN STYLE=\"word-break: break-all;\"> (x)/(x^(2)+9x+20)-(4)/(x^(2)+7x+12) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #364479 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=364479\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  (x)/(x^(2)+9x+20)-(4)/(x^(2)+7x+12)<BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "x/[(x+4)(x+5)] - 4/[(x+3)(x+4)]<BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "least common denominator: (x+4)(x+3)(x+5)<BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "Rewrite each fraction with the lcm as its denominator:<BR>\n" );
document.write( "[x(x+3) - 4(x+5)]/lcm<BR>\n" );
document.write( "------<BR>\n" );
document.write( "[x^2+3x-4x-20]/lcm<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "= (x^2-x-20)/ lcm<BR>\n" );
document.write( "------------<BR>\n" );
document.write( "= [(x-5)(x+4)] / [(x+3)(x+4)(x+5)]<BR>\n" );
document.write( "=====================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=====================<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );