Use synthetic division to decide whether the given number k is a zero of the given polynomial function If it is not give the value of f k f x x 4x 8x 15 k 3 Is 3 a zero of the function Select the correct choice below and if necessary fill in the answer box to complete your choice O A OB The given k is not a zero of the polynomial function f 3 Simplify your answer The given k is a zero of the polynomial function