September 2021 0 14 Report
Докажите равенство 1) (а-b)(а+b)=а*2степени - b*2степени 2) (а+b)(а*2 ст - аb - b*2ст)=a*3cт + b*3cт
3) (а-b)(а*2 ст + аb + b*2ст)=a*3cт - b*3cт
4) (а+b)*2 = а*2 ст + 2аb + b*2ст
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