Доведіть що вираз 764³-554³ ділиться на )
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01.02.2022 22:46
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Объяснение:
воспользуемся формулой разности кубов
a³-b³=(a-b)(a²+ab+b²)
764³-554³=(764-554)(764²+764·554+554²)=
=210(764²+764·554+554²)=70·3(764²+764·554+554²)
один из множителей равен 70
произведение делится на 70
доказано