The square root of `( 7 + 3sqrt(5)) (7 - 3sqrt(5))` is Options: A . &nbsp`sqrt(5)` B . &nbsp2 C . &nbsp4 D . &nbsp`3sqrt(5)`

The square root of `(

Question

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

Options:

A . `sqrt(5)`

B . 2

C . 4

D . `3sqrt(5)`

Answer: Option B

`sqrt((7 + 3sqrt(5)) (7 - 3sqrt(5)))` = `sqrt((7)^2 - (3sqrt(5))^2)` = ` sqrt(49 - 45)` = `sqrt(4)` = 2.

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