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 #144012 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=144012\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x^4+5x^2-36=0\r<BR>\n" );
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document.write( "usually  we  do  x^2+x-4 =0  for  example\r<BR>\n" );
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document.write( "but  just  use  same  tech\r<BR>\n" );
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document.write( "(x^2  -4) (x^2 +9)=0\r<BR>\n" );
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document.write( "use  FOIL  to  check\r<BR>\n" );
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document.write( "now  lets  look further\r<BR>\n" );
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document.write( "(x^2-4)  is  pattern  for  difference  of  squares  so\r<BR>\n" );
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document.write( "(x+2)  (x-2)  is  that  factor\r<BR>\n" );
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document.write( "unfortunately  x^2 +9  looks  factorable  but  is not\r<BR>\n" );
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document.write( "in  summary\r<BR>\n" );
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document.write( "(x+2) (x-2)  (x^2+9)  =0 </SPAN>\n" );
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