document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=817709>Question 817709</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me find all the zeros of this function. g(x)= x^4 - 5x^2 - 36  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #492158 by </B><A HREF=/tutors/aboutme.mpl?userid=dkppathak><B>dkppathak(439)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=dkppathak><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=dkppathak><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=492158\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  x^4 - 5x^2 - 36 =0<BR>\n" );
document.write( "let x^2=t<BR>\n" );
document.write( "than x^4=t^2<BR>\n" );
document.write( "by substitute <BR>\n" );
document.write( "t^2-5t-36=0<BR>\n" );
document.write( "by factorization splitting  middle term <BR>\n" );
document.write( "t^2-9t+4t-36=o<BR>\n" );
document.write( "(t-9)(t+4)=0<BR>\n" );
document.write( "t=9 or t=-4<BR>\n" );
document.write( "again putting t=x^2<BR>\n" );
document.write( "x^2=9 or x^2=-4<BR>\n" );
document.write( "x=3 0r x=-3 or x=sqr rt 2i or x=squr rt=-sqrrt2i </SPAN>\n" );
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