Question

prove that root 5 is irrational​

Answer 1

Answer:

√5 is irrational

let√5 be rational

√5=a/b where b is not equal to 0

squaring both sides

(a/b)²=√5

(a)²=√5b²

we have reached to a contradiction that a² is a factor of √5

therefore √5 is irrational as a and b both are even