Объяснение:
1)(t+m)² =t²+2tm+m²
2)(5c-9x)²=25c²-90cx+81x²
3)(4a+1/3b)³=64a³+3*16a²*(1/3)b+3*4a*(1/9)b²+b³/27=
=64a³+16a²b+(4/3)ab²+b³/27
Объяснение:
1)(t+m)² =t²+2tm+m²
2)(5c-9x)²=25c²-90cx+81x²
3)(4a+1/3b)³=64a³+3*16a²*(1/3)b+3*4a*(1/9)b²+b³/27=
=64a³+16a²b+(4/3)ab²+b³/27