а)
а³ + 1/8 у³ = (а + 1/2 у)(а² - 1/2 ау + 1/4 у²),
б)
а⁹ - 6³ = (а³ - 6)(а⁶ + 6а³ + 36)
a³ + b³ = (a+b)(a²-ab+b²)
a³ - b³ = (a-b)(a²+ab+b²)
a³+1/8y³ = a³ + (1/2y)³ = (a+1/2y)(a²-1/2ay+1/4y²)
a^9 - 6^3 = (a³)³ - 6³ = (a³-6)((a³)²+6a³ + 6²) = (a³-6)(a^6 + 6a³ + 36)
