$\"\"$

The polynomial function is $\"\"$ and zero : $\"\"$ .

The root of the function is $\"\"$ .

From the conjugate pair theorem, complex zeros occur in conjugate pairs.

Thus conjugate of $\"\"$ is $\"\"$ .

$\"\"$ .

$\"\"$ is a one of the factor of the function $\"\"$ .

$\"\"$ .

$\"\"$

Therefore, the remaining zeros of the function $\"\"$ are $\"\"$ and $\"\"$ .

$\"\"$

The remaining zeros of the function $\"\"$ are $\"\"$ and $\"\"$ .