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,
