SOLUTION: (4+8i)(4-8i)

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Question 629311: (4+8i)(4-8i)
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Note;  i^2 = -1

(4+8i)(4-8i) = 16 + 64 = 80

F	First terms   16

O	Outside terms -32i

I	Inside terms  +32i

L	Last terms   -1·-64 = 64