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The square root of (7 + 3 sqrt(5)) (7 - ...

The square root of `(7 + 3 sqrt(5)) (7 - 3 sqrt(5))` is :

A

4

B

`sqrt(5)`

C

`3sqrt(5)`

D

2

Text Solution

Verified by Experts

The correct Answer is:
D
`sqrt((7+3sqrt(5))(7-3sqrt(5)))`
`=sqrt(49-45)`
`=sqrt(4)=2`
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