Question

18. Prove that 2+√5 is an irrational number.​

Answer 1

Answer:

2 +root 5 cannot be written in p/q form....therefore it is an irrational no.

Step-by-step explanation:

HOPE IT HELPS!!!

Answer 2

Answer:

Hii! mate

Here's yours answer

Let us assum that 2+root5 is a rational no.

2+root5 =a/b

root 5=a/b-2

root 5 should be a rational no. because a/b-2 is a rational no.

but we know that root 5 is a rational no.

Hence our assumption was wrong

2+root5 is an irrational no.

Hope it helps you!