用配方法算下,x²-2/3x+2/3=0.

用配方法算下,x²-2/3x+2/3=0.
用配方法算下,x²-2/3x+2/3=0.

用配方法算下,x²-2/3x+2/3=0.
x²-2/3x+2/3=0
(x-1/3)^2=-2/3+1/9=-5/9
在实数内无解 .