document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=651799>Question 651799</A>: <I><SPAN STYLE=\"word-break: break-all;\"> hello. i need to simplify ln(z^4-z^2). i thought that i would use division because of the log rules but i keep getting the incorrect answer. ln(z^4)/ln(z^2) apparently isnt the answer and i do not know what is... </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #407818 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=407818\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ln(z^4-z^2) <BR>\n" );
document.write( "-----<BR>\n" );
document.write( "Factor:<BR>\n" );
document.write( "= ln(z^2(z^2-1))<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "= ln[z^2(z-1)(z+1)]<BR>\n" );
document.write( "----<BR>\n" );
document.write( "= ln(z^2) + ln(z-1) + ln(z+1)<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "= 2ln(z) + ln(z-1) + ln(z+1)<BR>\n" );
document.write( "===============================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============ </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );