Question

simlify 5 plus root 5 into 5 minus root 5​

Answer 1

Step-by-step explanation:

[5+rt5][5-rt5]

[5×5-5rt5+5rt5-rt5^2]

[25-0-5]

20

Answer 2

$\huge\underline\mathcal{Answer}:-$

$\huge\boxed{20}$

$\underline\mathcal{Explanation}:-$

$= \geqslant (5 + \sqrt{5} )\times( 5 - \sqrt{5} ) \\ = \geqslant {(5 - \sqrt{5} )}^{2} \\ = \geqslant 25 - 5 \\ = \geqslant 20$

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