4x的平方-4x=3
4X^2-4X-3=0
4X^2-4X+1-4=0
4X^2-4X+1=4
(2X-1)^2=4
所以,2X-1=2或2X-1=-2
2X-1=2
2X=3
X=3/2
2X-1=-2
2X=-2+1
2X=-1
X=-1/2
综上所述,X=-3/2或X=-1/2
不懂的欢迎追问,