Question

bracket 5 + under root 5 bracket close bracket 5 minus under root 5 bracket close

Answer 1

Hey friend,
Here is the answer you were looking for:
$(5 + \sqrt{5} )(5 - \sqrt{5} ) \\ = using \: the \: identity \: (a + b)(a - b) = ( {a}^{2} ) - ( {b}^{2} ) \\ {5}^{2} - ( { \sqrt{5} })^{2} \\ = 25 - 5 \\ 20$
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@Mahak24

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Answer 2

i hope this is right answer