Hej!
[tex]-x^3+4x^2-4x=0\\\\-x(x^2-4x+4)=0\\\\-x(x-2)^2=0 \ \ |:(-1)\\\\x(x-2)^2=0\\\\x=0 \ \vee \ x-2=0\\\\\boxed{x=0} \ \vee \ \boxed{x=2}[/tex]
Pozdrawiam! - Julka