Question

If the factors of a polynomial are x + 4 and x + 8, what values of x make that polynomial 0?

A. 1 and 4
B. 4 and 8
C. -4 and -8
D. Cannot be determined

Answer 1

Rule: if x-k is a factor of p(x), then p(k) = 0

Answer 2

and whats next step

Answer 3

example

if x-2 is a factor, then x = 2 is a root of p(x)

since x-k and x-2 match up, we see that k = 2