X²-2X-2=0
可化为：X²-2X+1-3=0
(X-1)²-3=0
(X-1)²=3
X-1 =根号3 或者X-1 = 负根号3
解得：x =根号3 +1
或者x =负根号3 +1
9(X+1/3）= 4
X+1/3 = 4 / 9
X = 4/9 - 1/3
X =1/9