分式加减法
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分式加减法分式加减法分式加减法原式={[(x-y)²+4xy]/(x-y)}*{[(x+y)²-4xy]/(x+y)=[(x²+2xy+y²)/(x-y)]*[
分式加减法
分式加减法
分式加减法
原式={[(x-y)²+4xy]/(x-y)}*{[(x+y)²-4xy]/(x+y)
=[(x²+2xy+y²)/(x-y)]*[(x²-2xy+y²)/(x+y)]
=[(x+y)²/(x-y)]*[(x-y)²/(x+y)]
=(x+y)(x-y)