prove that 2+3 root 5 is a irrational number?
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Let us assume that 2+3√5 is rational
Therefore,2+3√5=p/q where p and q are co-prime and q≠0
3√5=p/q-2
√5=p-2q/3q
So,√5 becomes rational
But we know that √5 is irrational
Therefore our assumption is wrong
2+3√5 is irrational
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