\(\text{x ‐ 2 xy + y = 0}\)
\(\text{=> x‐(2xy‐y)=0}\)
\(\text{=> x‐ y(2x‐1)=0}\)
\(\text{=> (2x‐2y)(2x‐1)=0}\)
\(\text{=> ( 2x‐1) ‐2y(2x‐1)=‐1}\)
\(\text{=> (2x‐1)(1‐2y)=‐1}\)
\(\text{=> ( 2x‐1 ; 1‐2y ) = ( ‐1 ;1 ﴿ ; ﴾1;‐1 )}\)
\(\text{=> (x;y)=( 0 ; 0 ) ; ( 1;1)}\)