Question 1054407
Graphing is helpful.  It has one real solution, x=-2.
Therefore, (x+2) is a factor and (x^2-2x+2) is another.
And your two complex solutions of 1+/-i are correct.
Question ambiguous.  Three solutions but only one real solution.
{{{graph(300,300,-10,10,-10,10,x^3-2x+4)}}}