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

Toán Lớp 7: (-2/5x bình y)×2/3 xy bình= bao nhiêu ạ

Toán Lớp 7: (-2/5x bình y)×2/3 xy bình= bao nhiêu ạ

Comments ( 2 )

  1. (-2/5x^2y) . 2/3xy^2
    = (-2/5 . 2/3)(x^2x)(yy^2)
    = -4/15x^3y^3  
     

  2. (-2/5x^2y) . 2/3xy^2
    =(-2/5 . 2/3)(x^2 .x)(y . y^2)
    =-4/15x^3y^3
     

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