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你好,很高兴为你回答:
题目是这样的吧
2x/(x²-y²)+x/(x+y)-y/(y-x)
=2x/(x²-y²)+(x²-xy)/(x²-y²)+(xy+y²)/(x²-y²)
=(2x+x²-xy+xy+y²)/(x²-y²)
=(2x+x²+y²)/(x²-y²)
如果题目是这样的:
2xy/(x²-y²)+x/(x+y)-y/(y-x)
=(2xy+x²+y²)/(x²-y²)
=(x+y)²/(x²-y²)
=(x+y)/(x-y)
望采纳哈
题目是这样的吧
2x/(x²-y²)+x/(x+y)-y/(y-x)
=2x/(x²-y²)+(x²-xy)/(x²-y²)+(xy+y²)/(x²-y²)
=(2x+x²-xy+xy+y²)/(x²-y²)
=(2x+x²+y²)/(x²-y²)
如果题目是这样的:
2xy/(x²-y²)+x/(x+y)-y/(y-x)
=(2xy+x²+y²)/(x²-y²)
=(x+y)²/(x²-y²)
=(x+y)/(x-y)
望采纳哈
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