.化简什么的(x-y+4xy/x-y)(x+y-4xy/x+y)抱歉我只是懒得算了..T T
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.化简什么的
(x-y+4xy/x-y)(x+y-4xy/x+y)
抱歉我只是懒得算了..T T
(x-y+4xy/x-y)(x+y-4xy/x+y)
抱歉我只是懒得算了..T T
![.化简什么的(x-y+4xy/x-y)(x+y-4xy/x+y)抱歉我只是懒得算了..T T](/uploads/image/z/18035612-44-2.jpg?t=.%E5%8C%96%E7%AE%80%E4%BB%80%E4%B9%88%E7%9A%84%28x-y%2B4xy%2Fx-y%29%28x%2By-4xy%2Fx%2By%29%E6%8A%B1%E6%AD%89%E6%88%91%E5%8F%AA%E6%98%AF%E6%87%92%E5%BE%97%E7%AE%97%E4%BA%86..T+T)
(x-y+4xy/x-y)(x+y-4xy/x+y)
=[(x-y)^2+4xy][(x+y)^2-4xy]/[(x-y)(x+y)]
=[(x+y)^2(x-y)^2]/[(x-y)(x+y)]
=(x-y)(x+y)
=x^2-y^2
=[(x-y)^2+4xy][(x+y)^2-4xy]/[(x-y)(x+y)]
=[(x+y)^2(x-y)^2]/[(x-y)(x+y)]
=(x-y)(x+y)
=x^2-y^2
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