document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=404705>Question 404705</A>: <I><SPAN STYLE=\"word-break: break-all;\"> can someone help me solve this hard problem please! Thank you! =)<BR>\n" );
document.write( "Z^4+8z^3-9z^2=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #285992 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=285992\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> z^4+8z^3-9z^2=0<BR>\n" );
document.write( "First, factor out what's common among all terms:<BR>\n" );
document.write( "z^2(Z^2+8z-9)=0<BR>\n" );
document.write( "factoring:<BR>\n" );
document.write( "z^2(z+9)(z-1)=0<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Solution:<BR>\n" );
document.write( "z= {-9,0,1} </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );