Ответ Автор - akalovskaya (x-1)^3 = (x-1)*(x-1)*(x-1) = (x-1)*(x^2-x-x+1) = (x-1)*(x^2-2x+1) = x^3 - 2x^2 + x - x^2 + 2x - 1 = x^3 - 3x^2 + 3x - 1