$\"\"$

The degree of $\"\"$ is $\"\"$ and the zeros are $\"\"$ , $\"\"$ .

Since the degree of the polynomial is $\"\"$ , the zeros of $\"\"$ are $\"\"$ .

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

Conjugate of $\"\"$ is $\"\"$ .

Remaining zero is $\"\"$ .

$\"\"$

The remaining zero of $\"\"$ is $\"\"$ .