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OpenStudy (anonymous):
Write the product in standard form. ( 9 + 5i)( 9 + 8i)
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OpenStudy (itsonlycdeee):
(9+5i)(9+8i) = 81 + 72i + 45i = 40i^2 (But remember i^2 = -1) So distribute and what do you get?
OpenStudy (anonymous):
thank u :)
OpenStudy (itsonlycdeee):
No prob! (:
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