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

Toán Lớp 8: 2(x-y)+a(y-x) Mình cảm ơn trước ạ.

Toán Lớp 8: 2(x-y)+a(y-x)
Mình cảm ơn trước ạ.

Comments ( 2 )

  1. @Bao
    2(x-y)+a(y-x)
    =2(x-y)-a(x-y)
    =(x-y)(2-a)

  2. 2(x-y)+a(y-x)
    =2(x-y)-a(x-y)
    =(x-y)(2-a)
     

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

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