Use the remainder theorem to determine whether x - 2 is a factor of
f(x) = x3 + 3x2 - 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