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

Toán Lớp 8: 4xy . 5x²y³ Giải giúp mình với ạ !!

Toán Lớp 8: 4xy . 5x²y³ Giải giúp mình với ạ !!

Comments ( 2 )

  1. 4xy . 5x^2y^3
    =4.x.y.5.x^2 . y^3
    =(4.5).(x.x^2).(y.y^3)
    =20.x^(1+2). y^(1+3)
    =20.x^3 . y^4
    =20x^3y^4
     

  2. Answer
    4xy . 5x^2y^3
    = 4 . x . y . 5 . x^2 . y^3
    = (4 . 5) . (x . x^2) . (y . y^3)
    = 20 . x^3 . y^4
    = 20x^3y^4

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

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