Question

prove that 2-√7 is irrational number ​

Answer 1

Step-by-step explanation:

Let us assume that 2/√7 is rational number. Now, 2√7/7 = p/q ( as rational no. ... 2/ √7 is an irrational number

Answer 2

Step-by-step explanation:

let 2-root7 if rational.

then , it can be written in the form of p /q.

Therefore 2-root7 = p/q

-root7 = p/q - 2

Here, p/q -2 is rational but root 7 if irrational.

Hence our assumption is incorrect.

Hence , 2-root7 is irrational.