化简:(x²-2xy+y-1)÷(x-y-1)

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化简:(x²-2xy+y-1)÷(x-y-1)
化简:(x²-2xy+y-1)÷(x-y-1)

化简:(x²-2xy+y-1)÷(x-y-1)
(x²-2xy+y²-1)÷(x-y-1)
=[(x-y)²-1]÷(x-y-1)
=(x-y-1)(x-y+1)÷(x-y-1)
=x-y+1