Posted by jayson on .
What does Descartes Rule of Signs tell you about the real roots of the polynomial
2x^3+3x^35x2=0
possible answers
one positive root either 2 or 0 neg
2 or 0 pos and 2 or 0 neg
one pos and one neg
either 2 or 0 pos and one neg

algebra 
jayson,
Please explain