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化简(x平方-y平方)/(x+y)+(x平方-2xy+y平方)/(x-y)

分类: 作业答案 • 2022-01-02 12:49:33
问题描述：

化简(x平方-y平方)/(x+y)+(x平方-2xy+y平方)/(x-y)

答

(x平方-y平方)/(x+y)+(x平方-2xy+y平方)/(x-y)
=(x-y)(x+y)/(x+y)+(x-y)平方/(x-y)
=x-y+x-y
=2x-2y

答

(x平方-y平方)/(x+y)+(x平方-2xy+y平方)/(x-y)
=(x+y)(x-y)/(x+y)+(x-y)^2/(x-y)
=x-y+x-y
=2(x-y)

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