Question 628948
Having a problem figuring out this algebra. Any help will be appreciated thanks 
(4+8i)(4-8i)
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You should recognize this the factored form of the difference of two squares which go like this:
(a+b)(a-b)=a^2-b^2
..
(4+8i)(4-8i)
=4^2-(8i)^2
=16-64i^2
i^2=-1
=16+64
=80