Obtain all zeros of the polynomial 
, if two of its zeros are -2 and -1.
We know that if 
is a zero of a polynomial then 
Since -2 and -1 are zeros of 
Therefore 
is a factor of 
.
Now on dividing 
to find other zeros.
By applying division algorithm, we have:
= (
)(
)
= 
(
)
= 
{
}
Hence, the zeros of the given polynomial are: 
3