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

Toán Lớp 8: (20x^5y-25x^3-5x^3):5x^3y bn tr đáp án thoi

Toán Lớp 8: (20x^5y-25x^3-5x^3):5x^3y bn tr đáp án thoi

Comments ( 2 )

  1. (20x^5y-25x^3-5x^3):5x^3y
    =20x^5y:5x^3y-25x^{3}:5x^3y-5x^{3}:5x^3y
    =4x^2-5-y^{-1}
     

  2. (20x^5y-25x^3y^2-5x^3y):5x^3y
    =(5x^3y.4x^2-5x^3y.5y-5x^3y):5x^3y
    =[5x^3y(4x^2-5y-1)]:5x^3y
    =4x^2-5y-1.
     

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