Answer:

Explanation:
Since 6 is a zero f f(x), then (x-6) is a factor of f(x). Now we will find the others factors
First, we divide f(x) by x-6:
1. divide the highest degree coefficients of the denominator
and divisor
:
quotient:

2. Multiply
by
:
.
Subtract
from
to obtain a new remainder:

Now, divide the new remainder by
. We repeat the previous steps:
3. quotient:

4. Multiply
by
:

Subtract
from
to obtain a new remainder:
.
5. Divide
by
. We obtain
and the new remainder is 0.
So, the quotiente

Then,

For find the other two zeros of f(x) we have the zeros of
.
We use the formula:
,
Then,

Then the zeros of f(x) are:
