document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=945695>Question 945695</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What substitution should be used to rewrite 4x4 – 21x2 + 20 = 0 as a quadratic equation?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #576877 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=576877\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 4x4–21x2+20=0\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Use proper text notation.<BR>\n" );
document.write( "4x^4–21x^2+20=0\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "That will appear rendered as<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4x%5E4-21x%5E2%2B20=0 ALIGN=MIDDLE  ALT=\"4x%5E4-21x%5E2%2B20=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Use any preferred different variable, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=u=x%5E2 ALIGN=MIDDLE  ALT=\"u=x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );