解一道数学题额。。以前，，的东西忘记了。。

2(x方-x)-1=0
2（（x-二分之一）方-四分之一）-1=0

2x^2-2x-1=2(x^2-x-1/2)=2(x^2-x+1/4)-3/2=2(x-1/2)^2-2/3

2x²-2x-1=2(x²-x+1/4)-1-1/2
=2(x-1/2)²-3/2

解：2x"2-2x-1=0
2(x"2-2x)=1
2(x"2-x+1/4)-1/2=1
2(x-1/2)"2=3/2
(x-1/2)"2=3/4
x-1/2=(+/-)根号3/4
x=1/2(+/-)(根号3/2)