Vì \(x^{15}=x\)
=> \(\orbr{\begin{cases}x=0\\x=1\end{cases}}\)
\(x^{15}=x\)
=> \(x^{15}-x=0\)
=> \(x\left(x^{14}-1\right)=0\)
=> \(\hept{\begin{cases}x=0\\x^{14}-1=0\end{cases}}\)
=> \(\hept{\begin{cases}x=0\\x^{14}=1\end{cases}}\)
=> \(\hept{\begin{cases}x=0\\x=1\end{cases}}\)