Question

СРОЧНО НУЖЕН ОТВЕТ ДАЮ ВСЕ СВОИ БАЛЛЫ.

Answer 1

$\displaystyle\\xy-x^2=-18\\xy+x^2=14\ \ \mid \cdot(-1)\\\\xy-x^2=-18\ (1)\\-xy-x^2=-14\ (2)\\\\(1)+(2)\Rightarrow -2x^2=-32\\\\2x^2=32\\\\x^2=16\\\\x=\pm 4\\\\\\x=-4:\\-4y+(-4)^2=14\\\\-4y=-2\\\\y=\frac{1}{2}\\\\x=4:\\\\4y+4^2=14\\\\4y=-2\\\\y=-\frac{1}{2}\\\\\\(x;y)=\bigg(-4;\frac{1}{2}\bigg),\bigg(4;-\frac{1}{2}\bigg)$