Show that root 5 is a irrational number

1.	Show that root 5 is a irrational number
Answer» Let √5 be a rational number√5 =a/bSquaring both sides,√5 ka whole square =a ka square/b ka square5=a square /b squares So, a square /5 =b square----------- eqn 1B square = a square /5 A square is divisible by 5So ,a is also divisible by 5Let a =5c Put a =5c in eqn 15c ka whole square /5 =b square 25 c square /5=b square5c square = b square

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