Răspuns:
√2x-1 = x
2x-1=x²
2x-1-x²=0
-(x²-2x+1)=0
-(x-1)²=0
(x-1)²=0 = ) x-1=0 = ) x=1
√2*1-1 = 1
1=1
Deci x = 1