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

Toán Lớp 8: xy-5x+y²-5y nhanh giúp mình với ạ

Toán Lớp 8: xy-5x+y²-5y nhanh giúp mình với ạ

Comments ( 2 )

  1. Giải đáp:
    xy – 5x + y^2 – 5y
    = x.y -5.x + y.y – 5.y
    = x( x -5) + y( y -5)
    = ( x + y)( y-5)

  2. xy-5x+y^2-5y
    =(xy+y^2)-(5x+5y)
    =y(x+y)-5(x+y)
    =(x+y)(y-5)

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

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