document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=536968>Question 536968</A>: <I><SPAN STYLE=\"word-break: break-all;\"> z-4/z-8-z+1/z+8+z-72/z^2-64    Perform the indicated operations and simplify. I have tried this a dozen times and keep getting different answers. Can you Please Help me? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #352679 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=352679\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (z-4)/(z-8)-(z+1)/(z+8)+(z-72)/(z^2-64)<BR>\n" );
document.write( "------<BR>\n" );
document.write( "least common denominator: z^2-64<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Rewrite each term with the lcd as its denominator:<BR>\n" );
document.write( "[(z-4)(z+8)]/lcd - [(z+1)(Z-8)]/lcd + [(z-72)]/lcd<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "Combine the numerators over the lcd:<BR>\n" );
document.write( "[z^2+4z-32 - [z^2-7z-8] + z-72]/lcd<BR>\n" );
document.write( "----<BR>\n" );
document.write( "[z^2+4z-32-z^2+7z+8+z-72]/lcd<BR>\n" );
document.write( "----<BR>\n" );
document.write( "= [12z-96]/[z^2-64]<BR>\n" );
document.write( "----<BR>\n" );
document.write( "= [12(z-8)]/[z^2-64]<BR>\n" );
document.write( "---<BR>\n" );
document.write( "= 12/(z+8]<BR>\n" );
document.write( "===============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );