Предмет: Алгебра, автор: Аноним

(m+3n)во второй степени=

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Автор ответа: LuckyDay1

Ответ 6mn потому что 3 во второй степени значит что 3 нужно умножить на 3 , а это значит ( m+3 n) во второй степени равно 6mn

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