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21-09-2018
Mathematics

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HELP!! Which choice is equivalent to the expression below?

HELP Which choice is equivalent to the expression below class=

Respuesta :

21-09-2018

Hey there!!

Remember - i = √-1

√-81 can be written as

√-1 × √81

√81 = 9

and √-1 = i

Final answer - 9i

Option c

Hope it helps!

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