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

Toán Lớp 8: (X mũ 3-y mũ 3) : (x mũ 2 + xy + y mũ 2 )

Toán Lớp 8: (X mũ 3-y mũ 3) : (x mũ 2 + xy + y mũ 2 )

Comments ( 2 )

  1. (x^3 -y^3) : (x^2 +xy+y^2)
    = (x-y)(x^2 +xy + y^2 ) :(x^2 +xy + y^2 )
    = x-y   

  2. (x³ – y³) : (x² + xy + y²) 
    = (x – y).(x² + xy + y²) : (x² + xy + y²)
    = x – y
    Chúc bạn học tốt
     

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