October 2021 0 19 Report
Надо решить по такому образу: 61 * 59 = (60+1)(60-1)=3600-1=3599 пример: 41 * 31   представьте в виде многочлена: (-х-у)(х-у) , (х-у)(у-х) , (a+b)(-a-b) , (-a+b)(b-a)
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