document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=3073>Question 3073</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am taking college algebra online and am having problems with equations and inequalities: for example:  find all real solutions by factoring:<BR>\n" );
document.write( "x^3+4x^2-x-4=0\r<BR>\n" );
document.write( "\n" );
document.write( "thanks<BR>\n" );
document.write( "Sal </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #1303 by </B><A HREF=/tutors/aboutme.mpl?userid=kiru_khandelwal><B>kiru_khandelwal(79)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=kiru_khandelwal><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=1303\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x^3 + 4x^2 -x -4 =0<BR>\n" );
document.write( "=> x^2(x+4) -(x+4) = 0<BR>\n" );
document.write( "=> (x+4)(x^2-1) = 0<BR>\n" );
document.write( "=> According to the zero product rule<BR>\n" );
document.write( "either x+4 = 0 or x^2-1 = 0<BR>\n" );
document.write( "=> if x+4 =0<BR>\n" );
document.write( "then x = -4<BR>\n" );
document.write( "and if x^2 -1 = 0<BR>\n" );
document.write( "then x^2 = 1<BR>\n" );
document.write( "=> x = sqrt(1) = +/-1\r<BR>\n" );
document.write( "\n" );
document.write( "so x = -4, +/-1 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );