9y^2-3y+1/4=0 因式法算!
问题描述：
9y^2-3y+1/4=0 因式法算!
答
9y^2-3y+1/4=0
(3y-1/2)^2=0
3y-1/2=0
3y=1/2
y=1/6
答
9y^2-3y+1/4
=（3y-1/2）^2
=0
所以3y=1/2 y=1/6