Question

prove that 3 + 2 √5 is irrational​

Answer 1

Answer:

we know that√5 is an irrational no. by contradiction method so,it is a irrational no.

I hope it's help you in your question

Answer 2

Answer:

let 3+2root5=a/b (a and b are real numbers b is not equal to 0)

2 root 5= a/b-3

a-3b/b

root 5= 2a-6b/b

lhs= rhs

but we know that root 5 is irrational number so 3+2roor 5 is irrational