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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 8: A=$\dfrac{2x}{x + 3}$ – $\dfrac{x}{x – 3}$ + $\dfrac{6x}{x² – 9}$ =>Rút gọn A

Toán Lớp 8: A=$\dfrac{2x}{x + 3}$ – $\dfrac{x}{x – 3}$ + $\dfrac{6x}{x² – 9}$
=>Rút gọn A