If (x + 8) is a factor of f(x), which of the following must be true? both x = –8 and x = 8 are roots of f(x). neither x = –8 nor x = 8 is a root of f(x). f(–8) = 0 f(8) = 0

f(-8)=0

C is correct

Step-by-step explanation:

If (x + 8) is a factor of f(x)

Factor of any polynomial gives zeros of the function.

If P(a)=0 then (x-a) must be factor of P(x).

vice versa

If (x+a) is factor of P(x) then P(-a) must be 0. [P(-a)=0]

We are given (x+8) is factor of f(x).

Therefore, x=-8 must be zero of function f(x).

f(-8) must be zero. Because it is root or x-intercept of function.

f(-8)=0 must be true.

560

step-by-step explanation:

giggidy

step-by-step explanation: