document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=856389>Question 856389</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is the value of x? The equation: x^4+7x^3-8x-56=0<BR>\n" );
document.write( "There are two values of x and I have only found one, which is -7. I have tried to solve (x^3-8) bit I end up getting a long answer, which is not correct since everyone I know has 2. Thank you for helping me! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #515895 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=515895\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x^4+7x^3-8x-56=0<BR>\n" );
document.write( "There should be four answers since x is to the 4th power. <BR>\n" );
document.write( "There are two real and two complex<BR>\n" );
document.write( "(x+7) (x^3-8) = 0<BR>\n" );
document.write( "(x+7)(x-2)(x^2+2x+4) = 0<BR>\n" );
document.write( "x=2<BR>\n" );
document.write( "x=-7 <BR>\n" );
document.write( "x = -1-i sqrt(3)<BR>\n" );
document.write( "x = -1+i sqrt(3) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );