已知x平方+3xy-4y2=0(y不等于0),求x-y/x+y的值为?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 16:53:13
![已知x平方+3xy-4y2=0(y不等于0),求x-y/x+y的值为?](/uploads/image/z/607789-37-9.jpg?t=%E5%B7%B2%E7%9F%A5x%E5%B9%B3%E6%96%B9%EF%BC%8B3xy%EF%BC%8D4y2%EF%BC%9D0%EF%BC%88y%E4%B8%8D%E7%AD%89%E4%BA%8E0%EF%BC%89%2C%E6%B1%82x%EF%BC%8Dy%2Fx%2By%E7%9A%84%E5%80%BC%E4%B8%BA%3F)
x){}K+l{+*54zg=Ov>_dWשlcSPRB
{eoTO%l骊8#mn]8fFnFI&\hg@4PXQZ}bZJ0RI'P"~0HCDLl@> A
已知x平方+3xy-4y2=0(y不等于0),求x-y/x+y的值为?
已知x平方+3xy-4y2=0(y不等于0),求x-y/x+y的值为?
已知x平方+3xy-4y2=0(y不等于0),求x-y/x+y的值为?
x^2+3xy-4y^2=0
(x-y)(x+4y)=0
x=y或x=-4y.
∴(x-y)/(x+y)=(y-y)/(y+y)=0
或(x-y)/(x+y)=(-4y-y)/(-4y+y)=5/3.