August 2021 0 4 Report
Если a-b=1 , то к чему ровняется a³-b³ Я сделал так. a³-b³=(a-b)(a²+ab+b²) . a-b = 1 так что a²+ab²+b² . Потом не могу продолжить. ответ 1+3b+3b²
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