Question

Спростити вираз
a(a-3)(a-3)-(a+2)(a^2-2a+4)

Answer 1

a(a-3)(a-3)-(a+2)(a²-2a+4)=(a²-3a)(a-3)-(a+2)(a²-2a+4)=a³-3a²-3a²+9a-(a-2)(a²-2a+4)=a³-3a²-3a²+9a-a³+2a²-4a-2a²+4a+8=-3a²-3a²+9a+8