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KhoaNe
2 năm trước
Khử mẫu lấy căn 1) √ $\frac{2}{7}$ 2) √ $\frac{x^2}{20}$ với x ≥0 3) $\frac{5x^3}{8y}$ với x ≥0 4) 2 √ $\frac{3}{20}$ + $\frac{1}{60}$ - √
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