y^2-2y+1分之xy-x-y+1(化简)

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y^2-2y+1分之xy-x-y+1(化简)

y^2-2y+1分之xy-x-y+1(化简)
y^2-2y+1分之xy-x-y+1(化简)

y^2-2y+1分之xy-x-y+1(化简)
原式=
[x(y-1)-(y-1)]/(y-1)^2
=(x-1)(y-1)/(y-1)^2
=(x-1)/(y-1)

=(x-1)(y-1) 除以(y-1)^2=(x-1)/(y-1)

=(x-1)(y-1)/(y-1)^2=(x-1)/(y-1)