\(\Rightarrow\left\{{}\begin{matrix}x^3+y^3=65\\3x^2y+3xy^2=60\end{matrix}\right.\)
\(\Rightarrow x^3+3x^2y+3xy^2+y^3=125\)
\(\Leftrightarrow\left(x+y\right)^3=125\Leftrightarrow x+y=5\Rightarrow y=5-x\)
Thế vào pt đầu:
\(x^3+\left(5-x\right)^3=65\)
\(\Leftrightarrow x^2-5x+4=0\Rightarrow\left[{}\begin{matrix}x=1;y=4\\y=4;y=1\end{matrix}\right.\)