Question

Use the rational zeroes theorem to factor the function f(x) = x3 – 21x + 20 completely.
(A) (x - 1)(x + 4)(x + 5)
(B) (x + 1)(x - 4)(x + 5)
(C) (x - 1)(x – 4)(x - 5)
(D) (x - 1)(x – 4)(x + 5)
(E) (x + 1)(x - 4)(x - 5)

Answer 1

Answer:

I think it might be the second one