Find all rational roots of P(x)=x3+x2−4x−4P(x) = x^3 + x^2 - 4x - 4P(x)=x3+x2−4x−4.
x=−1,2,−2x = -1, 2, -2x=−1,2,−2
x=1,−2,2x = 1, -2, 2x=1,−2,2
x=−1,−2,4x = -1, -2, 4x=−1,−2,4
x=1,2,−4x = 1, 2, -4x=1,2,−4