Решите систему уравнений Корень из х+корень из у=3 ху=4

[latex] left { {{ sqrt{x} + sqrt{y}=3} atop {xy=4}} ight. left { {{ sqrt{x+y} =2} atop { xy=4}} ight. left { {{x+y=4} atop {xy=4}} ight. left { {{x=4-y} atop {(4-y)y=4}} ight. left { {{x=4-2} atop {y=2}} ight. left { {{x=2} atop {y=2}} ight. [/latex][latex](4-y)y=4[/latex][latex] left { {{4-y=2} atop {y=2}} ight. left { {{y=2} atop {y=2}} ight. [/latex]