September 2021 0 7 Report
Запишите номера ВЕРНЫХ ответов. 1)(а+1)(2а-5)=2а^2+2a-5
2)25-a^2+(5+a)(a-5)
3)(b-1)(a-5)=-(1-b)(a-5)
4)5a^2-10a+25=(a-5)^2
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