Which polynomial has roots at x=1,x=−1,x = 1, x = -1,x=1,x=−1, and x=2x = 2x=2?
x3−2x2−x+2x^3 - 2x^2 - x + 2x3−2x2−x+2
x3+2x2−x−2x^3 + 2x^2 - x - 2x3+2x2−x−2
x3−x2−2x+1x^3 - x^2 - 2x + 1x3−x2−2x+1
x3−2x2+x−2x^3 - 2x^2 + x - 2x3−2x2+x−2