Question

3y^2-6y+2=0解方程

Answer 1

3y^2-6y+2=0
3(y^2-2y)+2=0
3(y-1)^2-1=0
3(y-1)^2=1
(y-1)^2=1/3
y-1=±√3/3
y=1±√3/3.