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约分x^2-(y-z）^2/(x+y)^2-z^2

分类: 作业答案 • 2022-02-06 19:14:30

问题描述：

约分x^2-(y-z）^2/(x+y)^2-z^2
约分x^2-(y-z）^2/(x+y)^2-z^2

答

x^2-(y-z）^2/(x+y)^2-z^2
=(x+y-z)(x-y+z)/(x+y+z)(x+y-z)
=(x-y+z)/(x+y+z)