Answer:
the answer is A
Step-by-step explanation:
4.
f(x) = (x + 2)(x + 1)(x - 3) = x^3 - 7·x - 6
a = 0 ; b = -7 ; c = -6
5.
a = -3 ∧ b = -2 ∧ c = -3
66
180 - 105 = 75
75 + 39 = 114
180 - 114 = 66