The degree of  is , the zeros are ,  and the multiplicity is .

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 .

Since the multiplicity is , the remaining zero is .

The four zeros are  and .

If  are the zeros of the polynomial , then the polynomial function can be written as , where  is the leading coefficient of the polynomial.

Consider the leading coefficient  as .

Hence, the polynomial function is  and .

The polynomial function is  and .