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

Toán Lớp 8: Kết quả ah x/x-3 +2/x-3 là j ah

Toán Lớp 8: Kết quả ah x/x-3 +2/x-3 là j ah

Comments ( 2 )

  1. x/(x-3)+ 2/(x-3)
    = (x+2)/(x-3)
    *** Quy tắc : A/M +B/M = (A+B)/M

  2. Gửi bạn:
    $\dfrac{x}{x-3}+\dfrac{2}{x-3}$ 
    $=\dfrac{x+2}{x-3}$ 

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

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