Question

What are the possible number of positive real, negative real, and complex zeros of
f(x) = -7x4 - 12x3 + 9x2 - 17x + 3?

Answer 1

A
Positive Real: 3 or 1
Negative Real: 1
Complex: 2 or 0

B
Positive Real: 3 or 1
Negative Real: 2 or 0
Complex: 1

C
Positive Real: 1
Negative Real: 3 or 1
Complex: 2 or 0

D
Positive Real: 4, 2 or 0
Negative Real: 1
Complex: 0 or 1 or 3

Answer 2

descartes rule of sign
do you know how to use it?

Answer 3

are you there?

Answer 4

no, i don't know how to use it