1)5x^2=x
5x^2-x=0
x(5x-1)=0
x=0 или 5x-1=0
x=0 x=1\5
-----------------------------------------
1.6x^2=3x
1.6x^2-3x=0
x(1.6x-3)=0
x=0 или 1.6x-3=0
x=0 или x= 3\1,6
---------------------------------------------------
x=x^2
x-x^2=0
x(1-x)=0
x=0 или x=1
=======================================