Автор - глеб201

помогите как решать (a-b)^3+(b-c)^3-(a-c)^3=-3(a-b)(b-c)(a-c)?

Ответ

Автор - Machetod
a^3-3a^2b+3ab^2-3b^2c+3bc^2-c^3+a^3-3a^3c+3ac^2-c^3=2a^3-3a^2b+3ab^2-3b^2c+3bc^2-2c^3-3a^2c+3ac^3

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