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

Toán Lớp 8: x^2-y^2-5x+5y=??? (Giúp em với ạ )

Toán Lớp 8: x^2-y^2-5x+5y=???
(Giúp em với ạ )

Comments ( 1 )

  1. x^2 – y^2 – 5x +5y
    = (x+y)(x-y)-5(x+y)
    =(x+y)(x-y-5)
    hok tốt nha^^
     

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