document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=191938>Question 191938</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780618851881/algebrahomeworkh>College Algebra A Graphing Approach</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> #8. x^4 + 5x^2 -36 = 0\r<BR>\n" );
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document.write( "I started working this problem and then got confused. If you could help with this. Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #144011 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=144011\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x^4 + 5x^2 -36 = 0 <BR>\n" );
document.write( "Factoring:<BR>\n" );
document.write( "(x^2+9)(x^2-4) = 0<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Setting each term to zero:<BR>\n" );
document.write( "(x^2+9) = 0<BR>\n" );
document.write( "x^2 = -9<BR>\n" );
document.write( "x = sqrt(-9)<BR>\n" );
document.write( "x = +- 3i<BR>\n" );
document.write( ".<BR>\n" );
document.write( "(x^2-4) = 0<BR>\n" );
document.write( "x^2 = 4<BR>\n" );
document.write( "x = sqrt(4)<BR>\n" );
document.write( "x = +- 2<BR>\n" );
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