若x+3y=0,xy不等于0,则分式(xy+y^2)分之x^2-3xy的值

来源：学生作业帮助网编辑：六六作业网时间：2024/05/23 23:07:00

若x+3y=0,xy不等于0,则分式(xy+y^2)分之x^2-3xy的值若x+3y=0,xy不等于0,则分式(xy+y^2)分之x^2-3xy的值若x+3y=0,xy不等于0,则分式(xy+y^2)

若x+3y=0,xy不等于0,则分式(xy+y^2)分之x^2-3xy的值
若x+3y=0,xy不等于0,则分式(xy+y^2)分之x^2-3xy的值

若x+3y=0,xy不等于0,则分式(xy+y^2)分之x^2-3xy的值
x+3y=0,所以X=-3Y
代入得（9Y^2+9Y^2)/(-3Y^2+Y^2)=-9