$\"\"$

The zeroes of the polynomial function are $\"\"$ .

If $\"\"$ is a zero, then $\"\"$ is also a zero.

According to the complex conjugate theorem,

Therefore, $\"\"$ are factors of the polynomial function.

The polynomial function as a product of its factors is $\"\"$ .

Solve the equation.

$\"\"$ (write the equation)

$\"\"$ (Regroup terms)

$\"\"$ (Difference of squares)

$\"\"$ (Foil method)

$\"\"$ (Simplify)

$\"\"$ (Distributive property: $\"\"$ )

$\"\"$ (Simplify)

$\"\"$ (Combine like terms)

Therefore the polynomial function is $\"\"$ .

$\"\"$

The polynomial function is $\"\"$ .