1)(х2 + х + 1) =
(I – II)(I2 + I·II
+ II2) = I3 – II3(I + II)(I2 – I·II + II2) = I3 + II3
(х – 1)(х2 + х · 1 + 12 ) =
= х3 – 13 =
х3 – 1
б) (х + 3)(х2 – 3х + 9) =
(х + 3)(х2 – х · 3 + 32 ) =
= х3 + 33 =
х3 + 27