Предмет: Алгебра, автор: 19102003

Помогите плииз с решением, решить нужно с помощью формул сокращенного умножения 7 класс нужно только решение, ответ 45 (написан сзади учебника)

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Автор ответа: ВладимирБ

Решение смотри на фото

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The simple present and the present continuous
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