Question

x^3-2x^2+x=0
x^2-4x+4=0
x^4-8x^2+16=0

Answer 1

x(x^2-2x+1)=0
x=0
(x-1)^1=0
x=1
(x-2)^2=0
x-2=0
x=2
(x^2-4)^2=0
x^2=4
x=+-2