Question

{x^2+y^2=0 { xy-3=0 помогите пожалуйста

Answer 1

Ответ:

\begin{gathered}\displaystyle \left \{ {{x^2+y^2-10=0} \atop {xy-3=0}} \right. \\\\ \left \{ {{(x+y)^2-2xy-10=0} \atop {xy=3} \right.\\\\(x+y)^2-6-10=0\\(x+y)^2=16\\\\ \left \{ {{x+y=\pm 4} \atop {yx=3}} \right. \\\\x_1=1;y_1=3\\x_2=3;y_2=1\\x_3=-1;y_3=-3\\x_4=-3;y_4=-1\end{gathered}