If (7+4sqrt(3))^(x^(2-8))+(7-4sqrt(3))^(...

If `(7+4sqrt(3))^(x^(2-8))+(7-4sqrt(3))^(x^(2-8))=14, then x=`

A

`3,sqrt7`

B

`+-3,+-4`

C

`+-3,+-sqrt7`

D

`+-4,+-sqrt6`

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The correct Answer is:

C

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