化简[x-y+4xy/(x-y)][x+y-4xy/(x-y)]
2个回答
原式={x-[y-4xy/(x-y)]}{x+[y-4xy(x-y)]}
=x²-[y-4xy(x-y)]
=x²-y+4xy(x-y)
=x²-y+4x²y-4xy²
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