1) Выразите через u+v и uv: д) (u^2 - v^2)(u-v);е)(u^3+v^3)(u+v)

2)Уравнение 6х^2+х-2=0 имеет корни х1 и х2. Не решая уравнения, найдите:

а)1/х1 + 1/х2;  б) х1^4 + х2^4;  в)1/х1^3 + 1/х2^3;  г) (х1^2+х2^2)^2

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