(y-1)(y-2)=2y(1-y)怎么解?速求!明天过期
问题描述：
(y-1)(y-2)=2y(1-y)怎么解?速求!明天过期
答
y^2-3y+2=2y-2y^2
y^2+5y-2=0
答
(y-1)(y-2)=2y(1-y)
(y-1)(y-2)+2y(y-1)=0
(y-1)(y-2+2y)=0
(y-1)(3y-2)=0
所以y=1或者2/3