# prove that 2+3√5 is irrational

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Let , 2 + 3√5 is an rational number

2 + 3√5 = A / B

3√5 = A / B - 2

√5 = A / 3B - 2

irrational = Rational

So , Our assumptions is incorrect ,

2 + 3√5 is an irrational number

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