X²-2x-2=0 要过程和答案

2024-11-26 13:46:13
推荐回答(3个)
回答1:

过程如下
1,x²-2x+1-3=0
2,(x-1)²-3=0
3,(x-1)²=3
4,x-1=±√3
5,x=±√3+1

回答2:

X²-2x-2=0
X²-2x+1-3=0
(x-1)^2=3
x-1=正负根号3
x=1+正负根号3

回答3:

(x-1)²-4=0
(x-1)²=4
x-1=2或x-1=-2
x=3或x=-1