Question

prove that 2 root 5 is irrational​

Answer 1

let us assume that 2+√5 is rational number

in the form of p/q qis not equal to 0

Step-by-step explanation:

√5 p/q -2

√5-2q/q

but √5 is irrational number

this leads to our contradiction our assumption is wrong

2+√5 is irrational number.

HENCE IT IS PROVED ..

Answer 2

Step-by-step explanation:

root 5 is an irrational number.

an irrational number + or × or ÷ or - another number will always be a irrational number only.