When Doing The Problems... determining and positive or negative real zeros i always get them wrong...
I Just Dont Get It...
Ex.
f(x)= 2x^4-x^3+6x^2-x+5
how is it 4 or 2 or 0 positive real zeros?
None Negatives?
Descartes' Sign Rule -- from Wolfram MathWorld
Can you state Descartes's Rule Of Signs ?