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Mathematics 10 Online
OpenStudy (anonymous):

radical -81 show work

jimthompson5910 (jim_thompson5910):

sqrt(-81) sqrt(-1*81) sqrt(-1*9*9) sqrt(-1*9^2) sqrt(-1)*sqrt(9^2) i*9 9i So sqrt(-81) = 9i

OpenStudy (anonymous):

He is correct

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