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hn3640874
2 năm trước
C = $\frac{2x - 5}{x}$ - $\frac{7x - 5}{1}$ D = $\frac{5x - 23}{x - 4}$ + $\frac{7 - x}{x - 4}$ với x ∦ 4 E = $\frac{7 - 2x}{3(x - 2)}$ + $\frac{2}{3}$ với x ∦ 2 Phân tích đa thức ra nhân tử: x ² + 4y² + 2x - 4y - 4xy - 35
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