a) ab²-b³у-ax + xy + b²-x;
б)=c²(a-b-c)-2d(a-c-b)=(a-b-c)*(c²-2d)
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a) ab²-b³у-ax + xy + b²-x;
б)=c²(a-b-c)-2d(a-c-b)=(a-b-c)*(c²-2d)
в) не знаю