Предмет: Алгебра, автор: УченикЛадушка7

Помогите решить!!!!Только первый столбец!!!Заранее,огромное спасибо))

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Автор ответа: Кротилла

0

$1)1-(3 \sqrt{7}+8)(3 \sqrt{7}-8)=1-(63-64)=1-(-1)=2$

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