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8 кл Тождественные преобразования рациональных выражений
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Выполните действия: 1) 56х3y4/z5 • (–z4/16x2y6); 2) 72a7/c10 : (24a3с8); 3) (3b – 3с)/c • 4с2/(b2 – c2); 4) (6x – 30)/(x + 8) : (x2 – 25)/(2x + 16). ( / означает дробную черту)
Вариант 1
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