3√(2-x)=1-√(x-1)
平方
18-9x=1-2√(x-1)+x-1=x-2√(x-1)
5x-9=√(x-1)
81-90x+25x^2=x-1
25x^2-91x+82=0
(x-2)(25x-41)=0
x=2,x=41/25
检验x=41/25不成立
所以x=2