\(\Leftrightarrow\left\{{}\begin{matrix}2xy-6x-4y=32\\x^2+y^2-2x-4y=33\end{matrix}\right.\)
\(\Rightarrow\left(x+y\right)^2-8\left(x+y\right)=65\)
\(\Leftrightarrow\left[{}\begin{matrix}x+y=13\\x+y=-5\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}y=13-x\\y=-5-x\end{matrix}\right.\)
Thế vào pt đầu