Задание 1 Упростите выражение и найдите его значение: (a² + 4a + 4)(a - 2) - (a² - 4a + 4)(a + 2), a = 52 - Задание 2 Докажите тождество: (a + b)(a² - ab + b²) - (a - b)(a² + ab + b²) = 203​
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