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quan69596
2 năm trước
rút gọn $\frac{2}{\sqrt{x}-1}$ + $\frac{2}{\sqrt{x}+1}$ - $\frac{x}{y}$ $\frac{\sqrt{x}+5}{1-x}$ phần rút gọn ảnh dưới là sai đúng không?
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