Предмет: Алгебра, автор: egorbatalov43

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(3х-2)²-(х+1)²

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Автор ответа: Аноним
1

\displaystyle (3x-2)^2-(x+1)^2=9x^2-12x+4-(x^2+2x+1)=\\9x^2-12x+4-x^2-2x-1=8x^2-14x+3

Автор ответа: vidssha0125
0
вот, удачи в учёбе!!
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