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See http://mathforum.org/library/drmath/view/52619.html for a proof of the irrationality of sqrt(3). The proof that sqrt(5) is irrational is identical (substituting 5 for 3 in the proof).

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Q: How can you proove that root 3 and root 5 are irrational?
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Related questions

Is the square root of 3 plus 5 an irrational number?

Yes, the sqrt of (3+5) is irrational, because: sqrt(3+5) = sqrt of 8, which is irrational


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