Question 1132054
Can use synthetic division with 2
2/1--- -2---- -4-----8
   1       0        -4         0
that is x^2-4
so the factors are (x-2)(x^2-4) or (x-2)(x-2)(x+2), or (x-2)^2*(x+2)

{{{graph(300,300,-10,10,-10,10,x^3-2x^2-4x+8)}}}