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prove that 2+root5 is an irrational number.

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2+root5

Let, p/q is irrational nos.

p/q=2+root5

p/q=2+root5

p/q-2=root5

p-2q=root5

therefore, root 5 irrational. 2+root5 is irrational hence our supposition contradicts

therefore, 2+root 5 is irrational no.

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