document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=495037>Question 495037</A>: <I><SPAN STYLE=\"word-break: break-all;\"> x^4= 16 <BR>\n" );
document.write( "using complex numbers solve for x. couldn't find any examples like this in the book.\r<BR>\n" );
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document.write( "i get the same answer every time : 2, -2 yet the back of the book has -2i and 2i also. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #335905 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=335905\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E4+=+16 ALIGN=MIDDLE  ALT=\"x%5E4+=+16\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E4+-+16+=+0 ALIGN=MIDDLE  ALT=\"x%5E4+-+16+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%5E2-4%29%2A%28x%5E2%2B4%29+=+0 ALIGN=MIDDLE  ALT=\"%28x%5E2-4%29%2A%28x%5E2%2B4%29+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2-4+=+0 ALIGN=MIDDLE  ALT=\"x%5E2-4+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x = -2, +2<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2%2B4+=+0 ALIGN=MIDDLE  ALT=\"x%5E2%2B4+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2+=+-4 ALIGN=MIDDLE  ALT=\"x%5E2+=+-4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x = -2i, +2i<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "The number of roots = the order of the equation.<BR>\n" );
document.write( "4th order --> 4 roots<BR>\n" );
document.write( "Sometimes the roots are repeated, eg, x^3=0<BR>\n" );
document.write( "--> x = 0,0,0<BR>\n" );
document.write( "3 roots, of 0, multiplicity 3<BR>\n" );
document.write( " </SPAN>\n" );
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