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

Toán Lớp 8: (xy-1) (-x²-6xy³+x) giúp với ạaaaaaa

Toán Lớp 8: (xy-1) (-x²-6xy³+x) giúp với ạaaaaaa

Comments ( 1 )

  1. (xy-1)(-x^2-6xy^3+x)
    =-xy.x^2-xy.6xy^3+xy.x-xy+x^2+6xy^3-x
    =-x^3y-6x^2y^4+x^2y+x^2-6xy^3-x

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

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