document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=664184>Question 664184</A>: <I><SPAN STYLE=\"word-break: break-all;\"> x^4-9x^2+20  Can you please help me solve this quadratic equation </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #413171 by </B><A HREF=/tutors/aboutme.mpl?userid=ReadingBoosters><B>ReadingBoosters(3246)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ReadingBoosters><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=413171\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Starting with<BR>\n" );
document.write( "x^4 - 9x^2 + 20 = 0<BR>\n" );
document.write( "(x^2 -  )(x^2 -  ) = 0  both negative due to - 9 and + 20<BR>\n" );
document.write( "Find common multiple of 20 that adds to -9<BR>\n" );
document.write( "(x^2-5)(x^2-4) = 0<BR>\n" );
document.write( "(x^2-4) can be factored further<BR>\n" );
document.write( "(x^2-5)(x+2)(x-2)<BR>\n" );
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