Предмет: Алгебра, автор: aleex22alex33

a^2 -2a +1
__________ - дробная черта Сократите дробь
a^2 - 1

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Автор ответа: RockZombie007

0

вот так)
числитель, как квадрат разности
знаменатель, как разность квадратов

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