document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=92195>Question 92195</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0395977258/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> According it Descartes' Rule of Signs, (a) how many positive real roots does each of the following have? (b) how many negative roots? 17)  f (x) = 3x^3 + 9x^2 + 8x  (a)_________  (b) __________ </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #67028 by </B><A HREF=/tutors/aboutme.mpl?userid=uma><B>uma(370)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=uma><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=67028\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> f (x) = 3x^3 + 9x^2 + 8x \r<BR>\n" );
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document.write( "There are no sign changes in the given expression.\r<BR>\n" );
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document.write( "==> there are no positive roots\r<BR>\n" );
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document.write( "Consider f(-x) = -3x^3 + 9x^2 - 8x\r<BR>\n" );
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document.write( "Here there are 2 sign changes.<BR>\n" );
document.write( "==> there are 2 negative roots.\r<BR>\n" );
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document.write( "Good Luck!!! </SPAN>\n" );
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