Acubic 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(3) = 0, we know that is a factor.

Hi!

You know that if f(p) = 0, then (x-p) is a factor of the polynomial f(x)

Then, f(3)=0 is the case p=0, son the factor is (x-3)

Since we are told that f(3) = 0, we know that (x-3) is a factor.

step-by-step explanation:

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