document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=919884>Question 919884</A>: <I><SPAN STYLE=\"word-break: break-all;\"> true or false: <BR>\n" );
document.write( "given that 4i is a zero of f(x)=x^4+13x^2-48, there must be three real zeros of f(x)?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #558029 by </B><A HREF=/tutors/aboutme.mpl?userid=richard1234><B>richard1234(7193)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richard1234><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=richard1234><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=558029\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> False\r<BR>\n" );
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document.write( "-4i must necessarily be a root. By fundamental thm. of algebra, f has exactly four complex roots (including multiple roots) so f has at most two real roots. </SPAN>\n" );
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