Question

3√5-8 is irrational number

Answer 1

Let 3√5-8 be a rational number.
A rational number is in the form of p/q where p,q are integers.

3√5-8 = p/q
3√5 = p/q + 8
3√5 = (p+8q)/q
√5 = (p+8q)/3q

p,q are integers then (p+8q)/3q is a rational number.
Then, √5 also must be a rational number,
But this contradicts the fact that √5 is an irrational number.
So,our supposition is false.

Therefore, 3√5-8 is an irrational number.
Hence proved.

Answer 2

Answer:

3 is not rational number and 3 is not irrational number

Step-by-step explanation:

it is a lucky number