化简求值:x-y/x²-2xy+y²-xy+y²/x²-y²,其中(x-2)²+y-3的绝对值=0【很急,
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![化简求值:x-y/x²-2xy+y²-xy+y²/x²-y²,其中(x-2)²+y-3的绝对值=0【很急,](/uploads/image/z/1488970-10-0.jpg?t=%E5%8C%96%E7%AE%80%E6%B1%82%E5%80%BC%EF%BC%9Ax-y%2Fx%26%23178%3B-2xy%2By%26%23178%3B-xy%2By%26%23178%3B%2Fx%26%23178%3B-y%26%23178%3B%2C%E5%85%B6%E4%B8%AD%28x-2%29%26%23178%3B%2By-3%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC%3D0%E3%80%90%E5%BE%88%E6%80%A5%2C)
化简求值:x-y/x²-2xy+y²-xy+y²/x²-y²,其中(x-2)²+y-3的绝对值=0【很急,
化简求值:x-y/x²-2xy+y²-xy+y²/x²-y²,其中(x-2)²+y-3的绝对值=0【很急,
化简求值:x-y/x²-2xy+y²-xy+y²/x²-y²,其中(x-2)²+y-3的绝对值=0【很急,
(x-2)²+∣y-3∣=0
(x-2)²=0,∣y-3∣=0
x=2
y=3
(x-y)/(x²-2xy+y²)-(xy+y²)/(x²-y²)
=(x-y)/(x-y)²-y(x+y)/(x-y)(x+y)
=1/(x-y)-y/(x-y)
=(1-y)/(x-y)
=(1-3)/(2-3)
=-2/(-1)
=2