If (x+1)(x + 1)(x+1) is a factor of P(x)=x4+2x3−x−2P(x) = x^4 + 2x^3 - x - 2P(x)=x4+2x3−x−2, verify this using the Factor Theorem.
P(−1)=0P(-1) = 0P(−1)=0
P(1)=0P(1) = 0P(1)=0
P(−1)=2P(-1) = 2P(−1)=2
P(0)=0P(0) = 0P(0)=0