The function is .

Find the all zeros of the function by equating  f(y) to 0.

f(y) = 0.

                  (The imaginary unit )

.

The zeros of the polynomial are .

The factors of the polynomial are .

So, the polynomial can be written as:

.

This is the product of linear factors of the polynomial.

The zeros of the polynomial are , and

The product of linear factors of the polynomial .