Question

Пожалуйста поподробнее

Answer 1

$left { {{sqrt{x}+sqrt{y}=8} atop {x-y=16}} right. \\ x-y=16\ (sqrt{x}-sqrt{y})(sqrt{x}+sqrt{y}) = 16\ 8(sqrt{x}-sqrt{y}) = 16\ sqrt{x}-sqrt{y} = 2\\ left { {{sqrt{x}+sqrt{y}=8} atop {sqrt{x}-sqrt{y}=2}} right. \\ 2sqrt{x}=10\ sqrt{x}=5\ x=25\\ x-y=16\ 25-y=16\ -y=-9\ y=9$