document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1136757>Question 1136757</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the equation x^4-13x^2+30?<BR>\n" );
document.write( "List all real solutions, separated by commas?<BR>\n" );
document.write( "x=<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #754552 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=754552\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "this factors into an x^2-  and an x^2- because the middle term is negative and last term is positive.  One can use a u substitution where u=x^2\r<BR>\n" );
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document.write( "(u-10)(u+3)=0 The given is an expression, the equal sign 0 makes it an equation.<BR>\n" );
document.write( "u=10 and -3<BR>\n" );
document.write( "x^2=10<BR>\n" );
document.write( "x+=/- sqrt (10) or (-sqrt(10), + sqrt (10)) ANSWER.  <BR>\n" );
document.write( "The other two solutions are complex/imaginary </SPAN>\n" );
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