Question

B. Prove that 3- 2V5 is irrational.​

Answer 1

Answer:

simple...

let take that no.is a rational number so it can be written in the form.of a/b where a and b are a pair of co-primes .

Step-by-step explanation:

now ,

a/b=3-2√5

now take that -3 and 2 from rhs to lhs, it will be:-

a/b+3/2=√5

see..a/b and 3/2 both are rationals...so there addition will also give a rational number but √5 is irrational so how it can be equal to a rational...means we took wrong asumption that the given number in question is rational...if its not rationals...means it is a irrational...