Question 852485
To be a polynomial we need real coefficients
so we want something like:
(x-2)(x+6i)(x-6i)
This expands to 
(x-2)( x^2 - (6i)^2 )
(x-2)( x^2 - ( 36i^2 ) )
(x-2)( x^2 - ( 36(-1)) )
(x-2)( x^2 + 36 ) expanded gives us
x^3 -2x^2 +36x -72
So our polynomial could be
x^3 -2x^2 +36x -72 = 0