The polynomial is ;.The binomial is a factor of polynomial.

Here is a zero of the realted polynomial function.

Use synthetic division to find remaining factor of the polynomial.

Since the remainder is zero, is a factor of polynomial.

The polynomial can be factores as .

The polynomial is the depressed polynomial.

                            (Trinomial factor)

Hence, .

Check:

Multiply the factors and check whether it is intial polynomial or not.

                                 (Factors)

                          (Group the factors)

  (Foil method)

                        (Multiply)

                 (Distributive property: )

                       (Multiply)

                                     (Simplify)

.