Question 1036614
The imaginary are conjugate.  use (x-i) and (x+i). Their product is x^2+1
Three real could be 1,0 and -1, factors are x,(x-1)(x+1) or x(x^2-1)or x^3-x.  Multiplying that by x^2+1 to get
x^5+x^3-x^2-x
{{{graph(300,200,-10,10,-10,10,x^5+x^3-x^2-x)}}}