Question

Prove that 3 + 2 5 is an irrational number.​

Answer 1

3+25 is not a irrational number because 3+25 is 28 and it is rational ..

Answer 2

$\huge \boxed{hey \: mate}$

$\huge \mathfrak \blue{answer - }$

3 + 2√5 = a/ b

2√5 =a/b -3

√5 =a-3b/2b

√5 is rational.

This contradiction the fact that √5 is irrational.

So our supposition is incorrect.

Hope this will help you.