document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=944577>Question 944577</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please differentiate the following.\r<BR>\n" );
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document.write( "d/dx[y/(x^2 + y^2)] + d/dy[ (-x/(x^2 + y^2)] </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #576620 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=576620\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=u=x%5E2%2By%5E2 ALIGN=MIDDLE  ALT=\"u=x%5E2%2By%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%28y%2Fu%29%2Fdx=-%28y%2Fu%5E2%29%28du%2Fdx%29=-%28y%2Fu%5E2%29%282x%29=%28-2xy%29%2F%28x%5E2%2By%5E2%29%5E2 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Similarly, <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%28-x%2Fu%29%2Fdy=-%28-x%2Fu%5E2%29%28du%2Fdy%29=%28x%2Fu%5E2%29%282y%29=%282xy%29%2F%28x%5E2%2By%5E2%29%5E2 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Adding them together,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%28y%2F%28x%5E2+%2B+y%5E2%29%29%2Fdx+%2B+d%28%28-x%29%2F%28x%5E2+%2B+y%5E2%29%29%2Fdy=0 ALIGN=MIDDLE  ALT=\"d%28y%2F%28x%5E2+%2B+y%5E2%29%29%2Fdx+%2B+d%28%28-x%29%2F%28x%5E2+%2B+y%5E2%29%29%2Fdy=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );