document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=94022>Question 94022</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello - need help PLEASE!!<BR>\n" );
document.write( "I need to determine if the given x-value is a zero of the function - show work<BR>\n" );
document.write( "f(x)=x^3+5x^2+2x-8  <BR>\n" );
document.write( "Is x= -2 a root -- don't undrstand at all<BR>\n" );
document.write( "thanks <BR>\n" );
document.write( "llo </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #68446 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=68446\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> f(x)=x^3+5x^2+2x-8 <BR>\n" );
document.write( "Is x= -2 a root <BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "If -2 is a zero of the function f(-2) will be zero.<BR>\n" );
document.write( "Try it:<BR>\n" );
document.write( "f(-2) = (-2)^3 + 5(-2)^2 + 3(-2) -8<BR>\n" );
document.write( "f(-2) = -8 +5*4 -6 -8<BR>\n" );
document.write( "f(-2) = -22 +20<BR>\n" );
document.write( "f(-2)  -2<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "Since the result is not zero -2 is not a zero.<BR>\n" );
document.write( "Cheers<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );