Question

If (x – 5) is a factor of f(x), which of the following must be true?

A: A root of f(x) is x=-5
B: A root of f(x) is x=5
C: Both x=-5 and x=5 are roots of f(x)
D: Neither x=-5 nor x=5 are a root of f(x)​

Answer 1

i believe it is B

Explanation:

x-5=0

+5 +5

x=5