SOLUTION: Simplify and express (4+i)(4-i) in the form a+bi

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Question 666077: Simplify and express (4+i)(4-i) in the form a+bi
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

 

Hi,

Simplify and express (4+i)(4-i) in the form a+bi

(4+i)(4-i) = 16 + 1 = 17

Verify with FOIL

F	First terms 16

O	Outside terms -4i

I	Inside terms   4i

L	Last terms  +i%28-i%29+=+-i%5E2+=+1  Note i^2 = -1