Answer:
The zeros of f(x) are: (x - 1), (x - 3) and (x - 8)
Explanation:
Given


Required
Find all zeros of the f(x)
If
then:

And
is a factor
Divide f(x) by x - 8

Expand the numerator

Rewrite as:

Factorize

Expand

Factorize


Multiply both sides by x - 8

Hence, the zeros of f(x) are: (x - 1), (x - 3) and (x - 8)