Question

prove root 5is irrational no.

Answer 1

let root 5 is rational number.

root 5 =p/q

squaring both sides, we get

5=p2/q2

p2=5q2

5 divides p as well as p2

let p=5m

5m2=5q2

25m2=5q2

25m by 5 is equal to 5 m2

Answer 2

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