document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=721421>Question 721421</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 	Solve the following equation using the substitution method. <BR>\n" );
document.write( "x^4  –5x^2  –14=0<BR>\n" );
document.write( "Complete the following steps to solve the above equation:<BR>\n" );
document.write( "	Let u=x^2, substitute the variables, and write the new equation.<BR>\n" );
document.write( "	Now factor the new equation, apply the zero-product principle, and solve for u.<BR>\n" );
document.write( "	Now substitute u=x^2 to solve for x.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #442357 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=442357\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve the following equation using the substitution method. <BR>\n" );
document.write( "x^4 –5x^2 –14=0<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Let u = x^2; then substitute:<BR>\n" );
document.write( "----<BR>\n" );
document.write( "u^2 -5u -14 = 0<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Factor:<BR>\n" );
document.write( "(u-7)(u+2) = 0<BR>\n" );
document.write( "----<BR>\n" );
document.write( "u = 7 or u = -2<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Solve for \"x\":<BR>\n" );
document.write( "x^2 = 7 or x^2 = -2<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "x = +-sqrt(7) or x = +-i*sqrt(2)<BR>\n" );
document.write( "=================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=====================<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );