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

Toán Lớp 8: x^2y – xz + z – y Giúp mik vs, lẹ ạ????????

Toán Lớp 8: x^2y – xz + z – y
Giúp mik vs, lẹ ạ????????

Comments ( 2 )

  1. x^2y-xz+z-y
    =(x^2y-y)-(xz-z)
    =y.(x^2-1)-z.(x-1)
    =y.(x-1)(x+1)-z.(x-1)
    =(x-1)[y.(x+1)-z]
    =(x-1)(yx+y-z]

  2. Giải đáp+Lời giải và giải thích chi tiết:
    x^2y – xz + z – y
    = (x^2y – y) – ( xz – z)
    = y(x^2 – 1) – z(x-1)
    = y(x+1)(x-1)-z(x-1)
    = (yx + y – z)(x-1)

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

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