document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=974338>Question 974338</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve the equation x^2-4x+8=0 in complex number system </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #596259 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=596259\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x^2-4x+8=0\r<BR>\n" );
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document.write( "quadratic formula<BR>\n" );
document.write( "x=  (1/2) 4+/- sqrt (16-32)   ;;sqrt (-16)\r<BR>\n" );
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document.write( "=(1/2) 4+/- 4i<BR>\n" );
document.write( "=2+2i; 2-2i\r<BR>\n" );
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document.write( "Check using the first\r<BR>\n" );
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document.write( "4+8i+4i^2-8-8i+8=<BR>\n" );
document.write( "(4*i^2=-4)\r<BR>\n" );
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document.write( "4-4+8i-8i+8-8=0 </SPAN>\n" );
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