document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=315837>Question 315837</A>: <I><SPAN STYLE=\"word-break: break-all;\"> List all numbers for which the rational expression is undefined\r<BR>\n" );
document.write( "\n" );
document.write( "4/b+7 \r<BR>\n" );
document.write( "\n" );
document.write( "I am not sure but I think 7 is the anwser. Could you please show me how to do this problem. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #225953 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=225953\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If the rational expression is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2F%28b%2B7%29 ALIGN=MIDDLE  ALT=\"4%2F%28b%2B7%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, then...\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "First take the denominator and set it equal to zero to get <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b%2B7=0 ALIGN=MIDDLE  ALT=\"b%2B7=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >. We're doing this because we want to find the values of 'b' that make the denominator zero (remember, we can't divide by zero).\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Solve <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b%2B7=0 ALIGN=MIDDLE  ALT=\"b%2B7=0\"   DISABLED_style= \"max-width:90%; height:auto;\" > to get <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b=-7 ALIGN=MIDDLE  ALT=\"b=-7\"   DISABLED_style= \"max-width:90%; height:auto;\" >. So the value <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b=-7 ALIGN=MIDDLE  ALT=\"b=-7\"   DISABLED_style= \"max-width:90%; height:auto;\" > makes the rational expression <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2F%28b%2B7%29 ALIGN=MIDDLE  ALT=\"4%2F%28b%2B7%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > undefined. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );