document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=872968>Question 872968</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Let f(x) = x^2 + 18x + 83. On what interval is the function decreasing? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #526554 by </B><A HREF=/tutors/aboutme.mpl?userid=psbhowmick><B>psbhowmick(878)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=psbhowmick><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=psbhowmick><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=526554\">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=f%28x%29+=+x%5E2+%2B+18x+%2B+83 ALIGN=MIDDLE  ALT=\"f%28x%29+=+x%5E2+%2B+18x+%2B+83\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28df%28x%29%29%2Fdx+=+2x+%2B+18 ALIGN=MIDDLE  ALT=\"%28df%28x%29%29%2Fdx+=+2x+%2B+18\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "For f(x) to be decreasing, f'(x) < 0 i.e. <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x+%2B+18+%3C+0 ALIGN=MIDDLE  ALT=\"2x+%2B+18+%3C+0\"   DISABLED_style= \"max-width:90%; height:auto;\" > i.e. x < -9 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );