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Giải phương trình
$10(\dfrac{x-2}{x+1})^2 + (\dfrac{x-2}{x+1})^2 - 11(\dfrac{x^2-4}{x^2-1}) = 0$
$10(\dfrac{x-2}{x+1})^2 + (\dfrac{x-2}{x+1})^2 - 11(\dfrac{x^2-4}{x^2-1}) = 0$
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