Предмет: Алгебра, автор: petropolylah228

Срочно, даю 20 баллов!

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Автор ответа: Аноним

Объяснение:

(x-1/x)^2=x^2-2•x•1/x+1/x^2

25=x^2-2+1/x^2

x^2-1/x^2=27

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