(x - 1)3 = (x - 1)2
=> (x - 1)3 - (x - 1)2 = 0
=> (x - 1)2.(x - 1 - 1) = 0
=> (x - 1)2.(x - 2) = 0
=> \(\orbr{\begin{cases}\left(x-1\right)^2=0\\x-2=0\end{cases}}\)=> \(\orbr{\begin{cases}x-1=0\\x=2\end{cases}}\)=> \(\orbr{\begin{cases}x=1\\x=2\end{cases}}\)