If is a zero of a polynomial with real coefficients in , then is a factor of the polynomial. With that in mind:
is the fully factored polynomial. All you need to do is multiply it out. Hint for less confusing algebra: Treat and as binomials with the complex number constants as single terms. Remember that the product of a conjugate pair of complex numbers is the SUM of two squares.
John
My calculator said it, I believe it, that settles it
