Question

упростите выражения
2) x(x + 2 )(x-2)-(x-3)(x^2 +3x+9)
4) (a-1)^3 -4a(a+1)(a-1) + 3(a-1)(a^2+a+1)

Answer 1

2)x(x+2)(x-2)-(x-3)(x²+3x+9)=x(x²-4)-(x³-27)=x³-4x-x³+27=-4x+27
4)(a-1)³-4a(a+1)(a-1)+3(a-1)(a²+a+1)=((a-1)²-4a(a+1)+3(a²+a+1))(a-1)=(-3a+4)(a-1)

Answer 2

Не 1 а 4

Answer 3

Сорт

Answer 4

Сорри