\(\Leftrightarrow x^4+2x^2y+y^2+x^2-2x+1=16\)
\(\Leftrightarrow\left(x^2+y\right)^2+\left(x-1\right)^2=16=0^2+4^2=4^2+0^2\)
\(\Rightarrow\left[{}\begin{matrix}\left\{{}\begin{matrix}x^2+y=0\\\left(x-1\right)^2=16\end{matrix}\right.\\\left\{{}\begin{matrix}\left(x^2+y\right)^2=16\\x-1=0\end{matrix}\right.\end{matrix}\right.\) \(\Leftrightarrow x;y=...\)