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

Toán Lớp 8: PTĐTTNT : 2x(y – z) + 5y(z –y )

Toán Lớp 8: PTĐTTNT : 2x(y – z) + 5y(z –y )

Comments ( 2 )

  1.   2x(y – z) + 5y(z –y )
    =2x(y-z)-5y(y-z)
    =(y-z)(2x-5y)

  2. 2x(y-z)+5y.(z-y)
    =2x(y-z)-5y(y-z)
    =(2x-5y).(y-z)

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