Question 1055344
There are three real roots in the graph
{{{graph(300,300,-10,10,-10,10,x^3-2x^2-x+2)}}}
You want (x^2+1), because (x+i)(x-i)=x^2-i^2=x^2-(-1)=x^2+1
Now expand (x^2+1)(x-2)
x^3-2x^2+x-2
{{{graph(300,300,-10,10,-10,10,x^3-2x^2+x-2)}}}