document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=958717>Question 958717</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 9^u-7*3^u+12=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #585908 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=585908\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 9^u-7*3^u+12=0<BR>\n" );
document.write( "3^2u-7*3^u+12=0<BR>\n" );
document.write( "let 3^u=a<BR>\n" );
document.write( "3^2u=a^2<BR>\n" );
document.write( "a^2-7a+12=0<BR>\n" );
document.write( "(a-4)(a-3)=0<BR>\n" );
document.write( "..<BR>\n" );
document.write( "a=4=3^u<BR>\n" );
document.write( "take log of both sides<BR>\n" );
document.write( "log4=ulog3<BR>\n" );
document.write( "u=log4/log3=1.2619<BR>\n" );
document.write( "or<BR>\n" );
document.write( "a=3=3^u<BR>\n" );
document.write( "take log of both sides<BR>\n" );
document.write( "log3=ulog3<BR>\n" );
document.write( "u=log3/log3=1\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );