document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=43896>Question 43896</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I just asked a question but was slightly wrong,here is the correct wording: If f(x)=x(x+3)(x-1), use interval notation to give all values of x where f(x) is greater than 0.  The last email said less than 0,I typed it wrong. Thanx </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #28853 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=28853\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A good way to analyze<BR>\n" );
document.write( "f(x) = x(x+3)(x-1)<BR>\n" );
document.write( "is to set up a number line and plot open points where f(x) equals zero, that is, at x = 0, x = -3, and at x = 1.  Open because the requirement is not \"or equal to.\"<BR>\n" );
document.write( "Then you test points within each interval (there are four of them) to see if f(x) becomes positive...try x = 2 for example...it works...thus part of the solution is x > 1.<BR>\n" );
document.write( "Then try x = 1/2.  It doesn't work.<BR>\n" );
document.write( "Then try x = -1.  That works, so that -3 < x < 0.<BR>\n" );
document.write( "Then try x = -5.  That doesn't work...<BR>\n" );
document.write( "And that is how you analyze this type of problem...<BR>\n" );
document.write( "Our solution is<BR>\n" );
document.write( "x > 1 or -3 < x < 0. </SPAN>\n" );
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