\(x^2\left(x-2\right)-2x^2+8x-8=0\)
\(\Leftrightarrow x^3-2x^2-2x^2+8x-8=0\)
\(\Leftrightarrow x^3-4x^2+8x-8=0\)
\(\Leftrightarrow\left(x-2\right)\left(x^2-2x+4\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x-2=0\\x^2-2x+4=0\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=2\\\left(x-1\right)^2+3=0\left(voly\right)\end{matrix}\right.\)
Vậy pt có nghiệm là x = 2