Question

What are the possible number of positive, negative, and complex zeros of f(x) = –x6 + x5– x4 + 4x3 – 12x2 + 12 ?

Answer 1

?

Answer 2

u need to use the rule of sign of descartes r u familiar with that rule?

Answer 3

no

Answer 4

Positive: 4, 2, or 0; Negative: 2 or 0; Complex: 6, 4, 2, or 0

Answer 5

u need to see the variations on the sign
for the case of positive zeros
u have

Answer 6

I don't understand