document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=165007>Question 165007</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find all numbers for which the rational expression is undefined<BR>\n" );
document.write( "fraction<BR>\n" );
document.write( "s^3-7s/s^2-25\r<BR>\n" );
document.write( "\n" );
document.write( "The number for which the rational expression is undefined are _. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #121703 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=121703\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (s^3-7s)/(s^2-25) I assume that this is the problem. Use parentheses to avoid confusion.<BR>\n" );
document.write( "(s^3-7s)/((s+5)(s-5))<BR>\n" );
document.write( "The expression is undefined when s=5 or s=-5 because then there would be division by zero, which is not allowed.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Ed<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );