Apolynomial function has a zero at x=3 which of the follwing expressions must be one factor of the polynomial. a. x + 3 b. 3x c. x^3 d. x - 3 but could you explain how to do it so i can do it on my own!

I think the correct answer from the choices listed above is option D. A polynomial function has a zero value at x=3 for the expression where one factor is x-3. This factor when x=3 will always result to a zero value no matter what you multiply to it. Hope this answers the question.