Question

3+2under root5 prove that it is a irrational number
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Answer 1

$3 + 2 \sqrt{5} \\ \sqrt{5} = 2.2360679775......... \\ its \: irrational \\ so \: 2 \sqrt{5} \: is \: also \: irrational \\ a \: number \: added \: to \: an \: irrationa \: number \: will \: also \: result \: in \: an \: irrational \: number \\ so \: 3 + 2 \sqrt{5} is \: also \: irrational$
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Answer 2

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