Question

Решите систему. Срочно

Answer 1

Ответ:

(x,y)=(9,4)

Объяснение:

$\left \{ {{\sqrt{x}-\sqrt{y} =1 } \atop {x-y=5}} \right. \\\left \{ {{\sqrt{5+y}-\sqrt{y} =1 } \atop {x=5+y}} \right.\\\left \{ {{\sqrt{5+y} =1+\sqrt{y} } \atop {x=5+y}} \right.\\ \left \{ {{5+y =1+2\sqrt{y}+y } \atop {x=5+y}} \right.\\ \left \{ {{4 =2\sqrt{y} } \atop {x=5+y}} \right.\\ \left \{ {{2 =\sqrt{y} } \atop {x=5+y}} \right.\\ \left \{ {{y=4 } \atop {x=5+4}} \right.\\ \left \{ {{y=4 } \atop {x=9}} \right.$