document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=86808>Question 86808</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I do not understand quadratic equations.  Here's my question from my book.  Solve each equation and inequality.  Write the solution set for each inequality in interval notation.  <BR>\n" );
document.write( "a.) x^2 - x - 12 = 0<BR>\n" );
document.write( "b.) x^2 - x - 12 < 0<BR>\n" );
document.write( "c.)x^2 - x - 12 > 0<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #62799 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=62799\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Write the solution set for each inequality in interval notation.  <BR>\n" );
document.write( "a.) x^2 - x - 12 = 0<BR>\n" );
document.write( "(x-4)(x+3)=0<BR>\n" );
document.write( "x=4 or x=-3<BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "b.) x^2 - x - 12 < 0<BR>\n" );
document.write( "(x-4)(x+3) < 0<BR>\n" );
document.write( "This product will be <0 where the signs are different.<BR>\n" );
document.write( "Draw a number line and plot x=-3 and +4 on it.<BR>\n" );
document.write( "Test each of the three intervals of the line to see where the solution set interval(s) is(are).<BR>\n" );
document.write( "If x--10 you get (-)(-) so no solutions in (-inf,-4)<BR>\n" );
document.write( "If x=0 you get (-)(+) so solutions in (-4,3)<BR>\n" );
document.write( "If x=+10 you get (+)(+) so no solutions in (3,+inf)<BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "c.)x^2 - x - 12 > 0<BR>\n" );
document.write( "(x-4)(x+3) >0<BR>\n" );
document.write( "From the work done above you see there are solutions in <BR>\n" );
document.write( "(-inf,-4) and in (3,+inf)<BR>\n" );
document.write( "=====================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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