Question

Prove that the following number is irrational.
(2-3√5)​

Answer 1

Step-by-step explanation:

2-3√5=a/b

3√5=a/b-2

3√5=a-2b/b

√5=a-2b/3b

now, a-2b/3b is rational but √5 is irrational.

our contradic assumption is wrong.