Use the remainder theorem to determine whether x - 2 is a factor of
f(x) = x^3 + 3x^2 - x - 18
a) yes, x - 2 is a factor of f(x) because f(2) = 0
b) no, x - 2 is not a factor of f(x) because f(2) = 0
c) yes, x - 2 is a factor of f(x) because f(-2) = -12
d) no, x - 2 is not a factor of f(x) because f(-2) = -12