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выполните действия используя формулы сокращения умножения :
а) (2а-3)(2а+3);
б) (m-2n)²
Ответы 2
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а) (2а)^2-3^2=4а^2-9б) m^2-2*m*2n+(2n)^2=m^2-4mn+4n^2
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Автор:
kendalxvxf - 6 лет назад
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0
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а)2а-3б)(m²-2•m•2n+2n²)=m²-4mn+4n2
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Автор:
felixy4ct - 6 лет назад
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0
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