Question

7 under root 5 irrational proof

Answer 1

To prove:7√5 is a irrational no.
Proof: Let 7√5 is a rational no.
Let 7√5=r
√5=r/7
√5 is an irrational no.
but r/7 is an irrational no.
They cannot be equal.
So our supposition is wrong.
So 7√5 is an irrational no.