(x-根号2）=根号5*X（2-根号2*x)
(x-根号2）-根号5*X（2-根号2*x）=0
(x-根号2）-根号5*X*√2（√2-x）=0
（x-√2)(1+√10x)=0
x-√2=0或1+√10x=0
即x1=√2,x2=-√10/10