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Умничка57338
@Умничка57338
September 2021
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докажите тождество:1)ab(b-c)+ac(c-b)-a(b²-3bc+c²)=abc;2)4a(a+b)-a(3a-4b)-8ab=a²;3)a(a+2b)+b(a+b)=b(2a+b)+a(a+b);4)a(b+c-bc)-b(a+c-ac)=(a-b)c Задание номер два Докажите значения выражения 6x(x-3)-9(2/3x²-2x+7)
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