Ответ:
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(a + b)² - 2ab - 2b² = a² + 2ab + b² - 2ab - 2b² = a² - b² или (a + b)(a - b)
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Ответ:
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(a + b)² - 2ab - 2b² = a² + 2ab + b² - 2ab - 2b² = a² - b² или (a + b)(a - b)
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