Question

$(5 + \sqrt{5} ) (5 - \sqrt{5} )$
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Answer 1

Hii

you are welcome in my ans

(5 + sqrt 5)(5 - sqrt5)

25 - 5

20

using formula

(a + b)(a - b) = a^2 - b^2

__/\__☺️

Hope my ans helps you✌️✊

Answer 2

Answer:

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HERE'S THE ANSWER ✌

⤵⤵⤵⤵⤵

( - 3 + \sqrt{5} )( - 3 - \sqrt{5} )

using formula,

{x}^{2} - {y}^{2} = (x + y)(x - y)

( - 3 )^{2} - ( \sqrt{5} ) ^{2}

9 - 5

4 \: \: \: \: \: \: \: \: answer