Question

What are the possible number of positive, negative, and complex zeros of f(x) = -2x3 + 5x2 + 6x - 4 ?

Answer 1

the number of zeros is determined by the degree of the polynomial.

since the degree of the polynomial is 3, there are 3 zeros. They can be psoitive, negative, complex and repeated.

Answer 2

Positive: 1; Negative: 2 or 0; Complex 2 or 0

Answer 3

So is this right?

Answer 4

i see 2 changes of sign so it must be 2 or 0 positive zeros

Answer 5

Positive: 2 or 0; Negative: 1; Complex: 2 or 0

Answer 6

?

Answer 7

yes

Answer 8

Awesome, thanks!