4X^2+8X+1=0

问题描述:

4X^2+8X+1=0

:4X^2+8X+1=0
x^2+2x+1/4=0
(x+1)^2=3/4
x+1=+/-(根3)/2
X1=-1+(根3)/2
X2=-1-(根3)/2