If f, left bracket, x, right bracket, equals, x, cubed, minus, 2, x, squared, minus, 40, x, minus, 64f(x)=x

Question

3
−2x
2
−40x−64, which of the following is not a factor of f, left bracket, x, right bracketf(x)?
Answer
Multiple Choice Answers
left bracket, x, plus, 2, right bracket(x+2)
left bracket, x, plus, 8, right bracket(x+8)
left bracket, x, minus, 8, right bracket(x−8)
left bracket, x, plus, 4, right bracket(x+4)

Answer 1

The answer is (x + 4) is not a factor of f(x).