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OpenStudy (anonymous):
Evaluate the expression (5+10i)(6-8i) and write your answer in the form a+bi where a,b are real numbers.
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OpenStudy (anonymous):
(5+10i)(6-8i)=30-40i+60i-80i^2 i^2=-1 so 110+20i
OpenStudy (anonymous):
Thanks thats what I ended up getting! :)
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