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ukguchi
@ukguchi
August 2022
1
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Алгебра 10 класс. Фото
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NNNLLL54
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2 votes
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NNNLLL54
домножаем на сопряжённые множители числитель и знаменатель дроби, затем пользуемся формулой "разность квадратов": A^2-B^2=(A-B)(A+B).
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