Ответ:
(4;729)
Объяснение:
(7+b)b=18=>b=-9;b=2\\a=9;a=-2\\\sqrt{x} =2=>x=4\\\sqrt[3]{y} =9=>y=729\\" alt="\left \{ {{\sqrt[3]{y}-\sqrt{x} =7 } \atop {\sqrt{x} \sqrt[3]{y} =18}} \right. \\\sqrt[3]{y}=a\\\sqrt{x} =b\\\left \{ {{a-b=7} \atop {ab=18}} \right. =>(7+b)b=18=>b=-9;b=2\\a=9;a=-2\\\sqrt{x} =2=>x=4\\\sqrt[3]{y} =9=>y=729\\" align="absmiddle" class="latex-formula">