(x+y)²-z²分之x²-(y-z)²

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/16 12:46:19

(x+y)²-z²分之x²-(y-z)²
(x+y)²-z²分之x²-(y-z)²

(x+y)²-z²分之x²-(y-z)²
=(x+y-z)(x-y+z)/(x+y+z)(x+y-z)
=(x-y+z)/(x+y+z)