(2x-1+4x+1)(2x-1-4x-1)=0
6x(-2x-2)=0
x=0,x=-1
(2x-1)²-(x-1)²=0
(2x-1+x-1)(2x-1-x+1)=0
x(3x-2)=0
x=0,x=2/3