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Xuanhong
2 năm trước
a) $\frac{√10 + 5√2}{√5 + 1}$ - 6√ $\frac{5}{2}$ + $\frac{12}{4-√10}$ b) D=√ $\frac{3+√5}{2}$ - √$\frac{3-√5}{2}$
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