2x²-4x+1=0 解方程快

问题描述:

2x²-4x+1=0 解方程

配方 2x^2-4x+2 -2 +1 =0
2(x-1)^2 = 1
(x-1)^2 = 1/2
x-1 = ± √2/2
x = 1± √2/2