{(x-y)² =4 ; x+y =6. {x-y = +/- 2; x+y =6. a) {x -y =-2 ;x+y =6. (x-y) +(x+y) = - 2 +6; 2x=4⇒x=2. (x+y) -(x-y) =6 -(-2) ; 2y =8⇒y=4. (2; 4). б) {x -y = 2 ;x+y =6. x=4; y = 2. (4;,2). ответ : (2; 4) , (4;,2).