已知-3
来源:学生作业帮助网 编辑:六六作业网 时间:2025/02/02 23:28:42
已知-3已知-3已知-3-3|y-2|+|y+3|-|3y+9|-|2y-4|=2-y+y+3-3y-9+4-2y=-5y|y-2|+|y+3|-|3y+9|-|2y-4|=2-y+y+3-3(y+3
已知-3
已知-3
已知-3
-3
|y-2|+|y+3|-|3y+9|-|2y-4|
=2-y+y+3-3y-9+4-2y
=-5y
|y-2|+|y+3|-|3y+9|-|2y-4|
=2-y+y+3-3(y+3)-2(2-y)
=-(2-y)-2(y+3)
=-2+y-2y-6
=-8-y
-y-8