CPM Homework Help : CCA2 Problem 10-121

For the polynomial function $f(x) = x^3 - 5x^2 + 11x - 15$ , which of the following are possible factors?

Hint:

The factored form of $f(x)$ will be $(x ± a)(x ± b)(x ± c)$ .
What must be true about the product of $a$ , $b$ , and $c$ ?