若多项式x²-2(kx-1)y+xy-x+y²不含xy的项,求k的值
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若多项式x²-2(kx-1)y+xy-x+y²不含xy的项,求k的值
若多项式x²-2(kx-1)y+xy-x+y²不含xy的项,求k的值
若多项式x²-2(kx-1)y+xy-x+y²不含xy的项,求k的值
x²-2(kx-1)y+xy-x+y²
=x²-2kxy-y+xy-x+y²
-2k+1=0
2k=1
k=0.5