Question

一.（1）3(x-2)平分-39=0 求x的值

Answer 1

1.

3(x-2)²-39=0

(x-2)²=13

x-2=±√13

x=2±√13

2.不知道题目意思

3.

|√2-√3|+|1-√2|-|1-√3|

=√3-√2+√2-1-(√3-1)=0