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OpenStudy (anonymous):
Express 12+√-81 in terms of i. A.21+i B.21i C.12-9i D.12+9i
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OpenStudy (anonymous):
\[\sqrt{-81}=\sqrt{81}\times \sqrt{-1}=9i\]
OpenStudy (unklerhaukus):
D.
OpenStudy (anonymous):
so last one
OpenStudy (anonymous):
SATELLITE! I need ur help!
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