Find an expression for a cubic function f if f(4) = 96 and f(-4) = f(0) = f(5) = 0. part 1 of 4 a cubic function generally has the form f(x) = ax3 + bx2 + cx + d. if we know that for some x-value x = p we have f(p) = 0, then it must be true that x − p is a factor of f(x). since we are told that f(5) = 0, we know that x-5 correct: your answer is correct. seenkey x-5 is a factor. part 2 of 4 similarly, since f(−4) = 0, then f(x) has the factor x+4 correct: your answer is correct. seenkey x+4 , and since f(0) = 0, then f(x) has the factor x correct: your answer is correct. seenkey x .