When we add two of the same number together, this is the same as multiplying by 2. For this problem, let's convert (4 + 2i) + (4 + 2i) into [tex]2(4 + 2i)[/tex].
After this step, we do something called distributing, so you multiply 2 by the number inside:
[tex]2(4 + 2i) = 8 + 4i[/tex].
Hope this helped.