Express in terms of i -√-81

[From: ] [author: ] [Date: 11-05-02] [Hit: ]

Can you please explain to me how I can solve this? i'm seriously lost

thanks

-√-81
-√((-1)(81))
-(i)(+ or - 9)
Final answers are: 9i or -9i

Express in terms of i -√-81?

i -√-81 = i - 9i = -8i >=================< ANSWER

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