document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=739891>Question 739891</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How can i solve this?<BR>\n" );
document.write( "4/(x^4+x^2+1) +  (x^2+x-1)/(x^2-x+1) + (x^2-x-1)/(x^2+x+1)<BR>\n" );
document.write( "The answer is 2!<BR>\n" );
document.write( "I need the process </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #451389 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20849)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=451389\">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=4%2F%28x%5E4%2Bx%5E2%2B1%29+%2B+%28x%5E2%2Bx-1%29%2F%28x%5E2-x%2B1%29+%2B+%28x%5E2-x-1%29%2F%28x%5E2%2Bx%2B1%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >....common denominator\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%284%28x%5E2-x%2B1%29%28x%5E2%2Bx%2B1%29+%2B+%28x%5E2%2Bx-1%29%28x%5E4%2Bx%5E2%2B1%29%28x%5E2%2Bx%2B1%29+%2B+%28x%5E2-x-1%29%28x%5E4%2Bx%5E2%2B1%29%28x%5E2-x%2B1%29+%29%2F%28%28x%5E4%2Bx%5E2%2B1%29%28x%5E2-x%2B1%29%28x%5E2%2Bx%2B1%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >....multiply all in numerator\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%284x%5E4%2B4x%5E2%2B4%29+%2B+%28x%5E8%2B2x%5E7%2B2x%5E6%2B2x%5E5%2Bx%5E4%2B2x%5E3-1%29+%2B+%28x%5E8-2x%5E7%2B2x%5E6-2x%5E5%2Bx%5E4-2x%5E3-1%29+%29%2F%28%28x%5E4%2Bx%5E2%2B1%29%28x%5E2-x%2B1%29%28x%5E2%2Bx%2B1%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%284x%5E4%2B4x%5E2%2Bhighlight%284%29%2Bx%5E8%2B2x%5E7%2B2x%5E6%2B2x%5E5%2Bx%5E4%2B2x%5E3-highlight%281%29%2Bx%5E8-2x%5E7%2B2x%5E6-2x%5E5%2Bx%5E4-2x%5E3-highlight%281%29+%29%2F%28x%5E8%2B2x%5E6%2B3x%5E4%2B2x%5E2%2B1%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%284x%5E4%2B4x%5E2%2Bx%5E8%2B2x%5E7%2B2x%5E6%2B2x%5E5%2Bx%5E4%2B2x%5E3%2Bx%5E8-2x%5E7%2B2x%5E6-2x%5E5%2Bx%5E4-2x%5E3%2Bhighlight%284%29-highlight%281%29-highlight%281%29+%29%2F%28x%5E8%2B2x%5E6%2B3x%5E4%2B2x%5E2%2B1%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282x%5E8%2B4x%5E6%2B6x%5E4%2B4x%5E2%2Bhighlight%282%29+%29%2F%28x%5E8%2B2x%5E6%2B3x%5E4%2B2x%5E2%2B1%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%28x%5E8%2B2x%5E6%2B3x%5E4%2B2x%5E2%2B1+%29%2F%28x%5E8%2B2x%5E6%2B3x%5E4%2B2x%5E2%2B1%29 ALIGN=MIDDLE  ALT=\"2%28x%5E8%2B2x%5E6%2B3x%5E4%2B2x%5E2%2B1+%29%2F%28x%5E8%2B2x%5E6%2B3x%5E4%2B2x%5E2%2B1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2cross%28%28x%5E8%2B2x%5E6%2B3x%5E4%2B2x%5E2%2B1%29+%29%2Fcross%28%28x%5E8%2B2x%5E6%2B3x%5E4%2B2x%5E2%2B1%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2 ALIGN=MIDDLE  ALT=\"2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );