Question 852485
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Hi,
(x-2)(x+6i){{{ highlight_green(x-6i)}}} 
 (x^2 -2x +6i - 12i) = (x^2 -2x - 6i)
 (x^2 -2x -6i)(x-6i)  to finish Up
 x^3 - 2x^2 - 6ix  - 6ix^2 +12ix - 36   
combine Like terms
x^3 -2(1+3i)x^2 +6ix - 36