x²-6y²=﹣xy 且x>0,y>0 求分式x+3y/x-y的值
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/25 10:34:21
x)PS64~´}sqES*gS "mlztO1P([|Vӆ=6IET1GΆz. kjTUj@ik\i{:*l*r:@tTjlM+5*\<;K;.
x²-6y²=﹣xy 且x>0,y>0 求分式x+3y/x-y的值
x²-6y²=﹣xy 且x>0,y>0 求分式x+3y/x-y的值
x²-6y²=﹣xy 且x>0,y>0 求分式x+3y/x-y的值
(x+3y)(x-2y)=0
x=-3y (舍去) x=2y
∴(x+3y)/(x-y)
=5y/(2y-y)
=5