Question

срочно, дам 50 балів

Answer 1

Відповідь: 2 способи

Пояснення: фото

Answer 2

Ответ:

Два решения: ($15\sqrt{2}$, $\sqrt{2}$) и ($\sqrt{2}$, $15\sqrt{2}$)

Объяснение:

$\left \{ {{2xy - \frac{3x}{y} = 15} \atop {xy-\frac{x}{y} = 15|*-3}} \right. \\\left \{ {{2xy - \frac{3x}{y} = 15} \atop {-3xy+\frac{3x}{y} = -45}} \right.\\\left \{ {{2xy - \frac{3x}{y} = 15} \atop {-3xy+\frac{3x}{y} = -45}} \right. \\+\\\left \{ {{-xy = -30|*-1} \atop {3*(-30)+45=-\frac{3x}{y}|*-1}} \right.$

$\left \{ {{xy = 30} \atop {45=\frac{3x}{y}|*\frac{y}{3}}} \right. \\\left \{ {{xy = 30} \atop {x=15y}} \right. \\\left \{ {{15y^2 = 30|:15} \atop {x=15y}} \right. \\\\\left \{ {{y^2 = 2} \atop {x=15y}} \right. \\\\\left \{ {{y^2 = 2} \atop {x=15y}} \right. \\\\\left \{ {{y = +-\sqrt{2}} \atop {x=+-15\sqrt{2} }} \right.$

Два решения: ($15\sqrt{2}$, $\sqrt{2}$) и ($\sqrt{2}$, $15\sqrt{2}$)