Question

If –1 is a root of f(x), which of the following must be true?

A factor of f(x) is (x – 1).
A factor of f(x) is (x + 1).
Both (x – 1) and (x + 1) are factors of f(x).
Neither (x – 1) nor (x + 1) is a factor of f(x).

Answer 1

B

Step-by-step explanation

A wise man once told me that this do be correct.

Answer 2

B

Explanation:

if x=-1

then x+1 is a factor of f(x)