I need help with this question
f(x)= x^3 + 4x^2 - 4x -16= x^2 (x+4)-4(x+4)=(x^2 -4) (x+4)x=2, x=-4so the point should be (2,0), (-4,0) and 16 to the down.Thus, number 1 is the correct answer.
