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

分类: 作业答案 • 2022-07-23 10:27:35

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)