请你先化简分式x²-2xy+y²/x²-xy÷(xy的-1次方-x的-1次方y),再将x=3-√3,y=√3代人求值.

请你先化简分式x²-2xy+y²/x²-xy÷(xy的-1次方-x的-1次方y),再将x=3-√3,y=√3代人求值.
请你先化简分式x²-2xy+y²/x²-xy÷(xy的-1次方-x的-1次方y),再将x=3-√3,y=√3代人求值.

请你先化简分式x²-2xy+y²/x²-xy÷(xy的-1次方-x的-1次方y),再将x=3-√3,y=√3代人求值.
x²-2xy+y²/x²-xy÷(xy的-1次方-x的-1次方y)
=（x-y）²/x(x-y)÷（x/y-y/x）
=(x-y)/x÷(x²-y²)/xy
=(x-y)÷（x+y）（x-y）/y
=y/(x+y)
=√3/(3-√3+√3)
=√3/3