Объяснение:
a³-b³=(a-b)(a²+ab+b²)
4) =(1/2)³+b³=(1/2 +b)(1/4-1/2b+b²
5) =(a²)³ - 2³ = (a² -2)(a^4 +2a²+4)
6) =(ab-c)( a²b² +abc +c²)
1) =b³-4³=b³-64
2) =(2a)³+(3b)³=8a³+27b³
3) =(x³)³+ (6y)³=x^9+216y³
4) =(1/4a)³ - (1/5b)³ =(1/64)a³ - (1/125)b³
