\(\Leftrightarrow y^2+2x^6-2x^3y=64\)
\(\Leftrightarrow\left(x^3-y\right)^2+\left(x^3\right)^2=64=0^2+8^2\)
\(\Rightarrow\left[{}\begin{matrix}\left\{{}\begin{matrix}\left(x^3-y\right)^2=0\\x^6=64\end{matrix}\right.\\\left\{{}\begin{matrix}\left(x^3-y\right)^2=64\\x^6=0\end{matrix}\right.\end{matrix}\right.\) \(\Leftrightarrow...\)