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The simplest form of (sqrt(8+sqrt28)-sqr...

The simplest form of `(sqrt(8+sqrt28)-sqrt(8-sqrt(28)))/(sqrt(8+sqrt(28))+sqrt(8-sqrt(28)))`

A

`1/(sqrt(7))`

B

`sqrt(7)`

C

`-2 sqrt(7)`

D

`(1)/(-2sqrt(7))`

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The correct Answer is:
A
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