Question

What are the possible number of positive real, negative real, and complex zeros of f(x) = -7x4 - 12x3 + 9x2 - 17x + 3? (1 points)
Answer
Positive Real: 3 or 1
Negative Real: 1
Complex: 2 or 0
Positive Real: 3 or 1
Negative Real: 2 or 0
Complex: 1
Positive Real: 1
Negative Real: 3 or 1
Complex: 2 or 0
Positive Real: 4, 2 or 0
Negative Real: 1
Complex: 0 or 1 or 3

Answer 1

3 sign changes in f(x) --> 1 or 3 positive zeros

1 sign change in f(-x) --> 1 neg zero

4 total zeros --> 0 or 2 complex zeros