Question 628948: Having a problem figuring out this algebra. Any help will be appreciated thanks
(4+8i)(4-8i) Found 2 solutions by stanbon, lwsshak3:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! (4+8i)(4-8i)
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4(4-8i)+8i(4-8i)
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= 16 - 32i + 32i + 64
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= 80
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Cheers,
Stan H.
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You can put this solution on YOUR website! 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
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