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Question #684df

1 Answer

Mar 13, 2017

#x = +- 4 i#

Explanation:

#x^2 + 16 = 0#

#x^2 = -16#

# x^2 = 16 * -1#

#x^2 = 16 i^2#, where #i^2 =-1#

#x = sqrt (16 i^2)#

#x = +- 4 i#

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