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

Toán Lớp 8: 5xy-4y trên 2x^2y^3 + 3xy+4y trên 2x^2y^3

Toán Lớp 8: 5xy-4y trên 2x^2y^3 + 3xy+4y trên 2x^2y^3

Comments ( 2 )

  1. $\dfrac{5xy – 4y}{2x²y³}$ + $\dfrac{3xy + 4y}{2x²y³}$ Đkxđ: x $\neq$ 0; y $\neq$ 0
    = $\dfrac{5xy – 4y + 3xy + 4y}{2x²y³}$
    = $\dfrac{8xy}{2x²y³}$
    = $\dfrac{4}{xy²}$  
    Chúc bạn học tốt
     

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