1.Если х-у = 1,2, а ху = - 0,22, то величина х^2 + y^2 равна
1)2,58 2)1,44 3)1 4)1,88 5)0,6
С решением!
2. Вычислить 2(у/х)^2, если (х^2- y^2)/(2у-х)^2-x^2 = 0
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