document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=325268>Question 325268</A>: <I><SPAN STYLE=\"word-break: break-all;\"> why can't substitute 3 for x in the rational expression 2/x-3? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #232920 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=232920\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If you plug in x=3, you get <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2F%283-3%29=2%2F0 ALIGN=MIDDLE  ALT=\"2%2F%283-3%29=2%2F0\"   DISABLED_style= \"max-width:90%; height:auto;\" > but you CANNOT divide by zero. So this is why you CANNOT plug in x=3. We say that <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=3 ALIGN=MIDDLE  ALT=\"x=3\"   DISABLED_style= \"max-width:90%; height:auto;\" > is not in the domain of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2F%28x-3%29 ALIGN=MIDDLE  ALT=\"2%2F%28x-3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > (ie it's not an allowable input). </SPAN>\n" );
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