Answer:

Step-by-step explanation:
The diagram is drawn and attached below.
From the diagram


The prime factorization is $2016=2^5\times3^2\times7$. Since the problem is only asking us for the distinct prime factors, we have $2,3,7$. Their desired sum is then $\boxed{\textbf{(B) }12}$.
Answer:
{-12, 9, 24}
Step-by-step explanation:
Set the given f(x) = (x - 9)(x + 12)(x - 24) = to 0. Then, one by one, set each factor = to 0 and solve for x: We get the zeros {-12, 9, 24}