If f(x)=x2−x−12f(x) = x^2 - x - 12f(x)=x2−x−12, which of the following are roots of fff?
x=4x = 4x=4 and x=−3x = -3x=−3
x=3x = 3x=3 and x=−4x = -4x=−4
x=6x = 6x=6 and x=−2x = -2x=−2
x=12x = 12x=12 and x=−1x = -1x=−1