Question

Given that √5 is irrational, prove that 2√5 − 3is an irrational number.

Answer 1

Step-by-step explanation:

it is given that √5 is irrational.. so..

2* √5 - 3

-1√5 ..if we multiply √5 which is irrational by -1 then the answer will be irrational.. so 2√5-3 is also irrational no..

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Answer 2

Step-by-step explanation:

this type of proves called contradiction