Pliss, jawab no 14 ya Mau dikumpulin hari ini

f'(x) = 6x²+18x+18
alfa+beta = -b/a = -3
alfa*beta = c/a = 3

alfa³+beta³ = [alfa+beta]³ - [3alfa*beta(alfa+beta)]
= [-3]³ - [3.3(-3)]
= -27 - (-27) = 0