若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/19 15:44:26
若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值

若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值
若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值

若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值
(x-y)分之(x+y)=3
(x+y)分之5(x-y)—2(x-y)分之(x+y)
=5*(x+y)分之(x-y) -2*3
=5/(x-y)分之(x+y)-6
= 5/3 -6
= -13/3