9514 1404 393
Answer:
C. Two or zero
Step-by-step explanation:
The signs of the polynomial terms are: + + - +.
There are two sign changes, one from + to -, and the other from - to +. The two sign changes means the number of positive real roots will be a maximum of 2. Any even number of roots may be complex, so will not be real. That is, the number of positive real roots may be 2 or 0.
