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OpenStudy (anonymous):
help simplify and show work please! (4+i)^2
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OpenStudy (anonymous):
i for imaginary number?
OpenStudy (anonymous):
yes!
OpenStudy (cwrw238):
16 + 8i - 1 = 15 + 8i
OpenStudy (cwrw238):
i ^ 2 = -1 ( by definition)
OpenStudy (anonymous):
(4+i)(4+i) = 16+8i+i^2 Since i^2=-1 you get: 15+8i Hope this helps!?! :) //Ali
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OpenStudy (anonymous):
thanks everyone!
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