Question

What are the possible numbers of positive, negative, and complex zeros of f(x) = -3x4 - 5x3 - x2 - 8x + 4?

Answer 1

1 positive, 3 or 1 negative and 3 or 1 complex? that's what I got

Answer 2

hmmm 1 positive real, yes
3 or 1 negative real, yes

is a 4 degree equation, so 4 roots

so either 1 positive and 3 negative ones = 4
or 1 positive 1 negative and 2 comples =4

Answer 3

ohhhh when I looked at it it looked like a 3rd degree polynomial! thanks haha @jdoe0001

Answer 4

yw