document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=296657>Question 296657</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve b^4 + 2b^2 - 24 = 0\r<BR>\n" );
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document.write( "a) -2, -sqrt6, sqrt6, 2<BR>\n" );
document.write( "b) -sqrt6, 2, 2i, i sqrt6<BR>\n" );
document.write( "c) -2, 2, -i sqrt6, i sqrt6<BR>\n" );
document.write( "d) -2i, 2i - sqrt6, sqrt6 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #213724 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=213724\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I'll get you started.<BR>\n" );
document.write( "Since all complex roots come in plus minus pairs, answer b is out<BR>\n" );
document.write( "To solve the equation, substitute u for b^2<BR>\n" );
document.write( "b^4 + 2b^2 - 24 = 0 <BR>\n" );
document.write( "u^2+2u-24=0<BR>\n" );
document.write( "(u-4)*(u+6)=0<BR>\n" );
document.write( "now plug b^2 back in for u\r<BR>\n" );
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document.write( "(b^2-4)*(b^+6)=0<BR>\n" );
document.write( "(b-2)*(b+2)*(b^2+6)=0<BR>\n" );
document.write( "solve for b<BR>\n" );
document.write( "so b = +-2<BR>\n" );
document.write( "answer d is out<BR>\n" );
document.write( "b^2=-6<BR>\n" );
document.write( "so answer a is out <BR>\n" );
document.write( "so it must be answer c </SPAN>\n" );
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