Решите систему уравнений X+y=4 Xy=3

[latex] \left \{ {{x+y=4} \atop {xy=3}} \right. \; \left \{ {{y=4-x} \atop {x(4-x)=3}} \right. \; \left \{ {{y=4-x} \atop {x^2-4x+3=0}} \right. \; \left \{ {{y=4-x} \atop {x_1=1,x_2=3}} \right. \; \left \{ {{y_1=3,y_2=1} \atop {x_1=1,x_2=3}} \right. \\\\Otvet:\; \; (1,3)\; ,\; (3,1)\; .[/latex]