document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=519414>Question 519414</A>: <I><SPAN STYLE=\"word-break: break-all;\"> (x+20)(x-7)(x+4)>0<BR>\n" );
document.write( "solution set? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #345569 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=345569\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (x+20)(x-7)(x+4) > 0<BR>\n" );
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document.write( "Draw a number line and plot x = -20, x = -4, and x = 7<BR>\n" );
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document.write( "Test a value from each of the 4 intervals in the inequality:<BR>\n" );
document.write( "(x+20)(x+4)(x-7) > 0<BR>\n" );
document.write( "Test x = -30 ; -*-*- > 0 ; false<BR>\n" );
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document.write( "Test x = -10 ; +*-*- > 0 ; true, so solutions in (-20,-4)<BR>\n" );
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document.write( "Test x = 0 ; +*-*+ > 0 ; false<BR>\n" );
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document.write( "Test 10 ; +*+*+ > 0 ; true, so solutions in (7,+oo)<BR>\n" );
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document.write( "Solution: (-20,-4)U(7,+oo)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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