document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=287637>Question 287637</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve x^4 - 9 ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #208387 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=208387\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> To be solved there must be an equal sign.<BR>\n" );
document.write( "Otherwise it can be factored or simplified but not solved.<BR>\n" );
document.write( "let u^2=x^4 so u=x^2<BR>\n" );
document.write( "u^2-9=<BR>\n" );
document.write( "(u-3)*(u+3)<BR>\n" );
document.write( "(x^2-3)*(x^2+3)<BR>\n" );
document.write( " </SPAN>\n" );
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