已知y=x^2-3xy-2y^2/2y.求x:y的值

问题描述:

已知y=x^2-3xy-2y^2/2y.求x:y的值

x^2-3xy-2y^2=2y^2
x^2-3xy-4y^2=(x+y)(x-4y)=0
x=-y,x=4y
x:y=-1,x:y=4