document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=28394>Question 28394</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need to solve this equation: x^(1/4)-10x^(1/8)+21=0 for x.\r<BR>\n" );
document.write( "\n" );
document.write( "I totally forgot how to do this. My instructor mentioned something along the lines of this: t=x^(1/8) in this equation: at^2+bt+c=0\r<BR>\n" );
document.write( "\n" );
document.write( "Still lost... Thanks! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #15461 by </B><A HREF=/tutors/aboutme.mpl?userid=venugopalramana><B>venugopalramana(3286)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=venugopalramana><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.geocities.com/venugopalramana/FREE_MATHS_ASSISTANCE.html valign=middle><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=15461\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I need to solve this equation: x^(1/4)-10x^(1/8)+21=0 for x. <BR>\n" );
document.write( "I totally forgot how to do this. My instructor mentioned something along the lines of this: t=x^(1/8) in this equation: at^2+bt+c=0 <BR>\n" );
document.write( "Still lost... Thanks!<BR>\n" );
document.write( "YA PUT X^1/8=T...SO THAT...............X^1/4=(X^1/8)^2=T^2..SO WE GET <BR>\n" );
document.write( "T^2-10T+21=0<BR>\n" );
document.write( "T^2-3T-7T+21=0<BR>\n" );
document.write( "T(T-3)-7(T-3)=0<BR>\n" );
document.write( "(T-3)(T-7)=0<BR>\n" );
document.write( "T=3 OR 7<BR>\n" );
document.write( "SO X^1/8=3 OR 7<BR>\n" );
document.write( "X=3^8 OR 7^8 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );