# Find which of the

(i) x2 = 5

On taking square root on both sides, we get

ā x = Ā± ā5

So, x is an irrational number.

(ii) y2 = 9

On taking square root on both sides, we get

ā y = Ā± 3

So, y is a rational number.

(iii) z2 = .04

On taking square root on both sides, we get

ā z = Ā± 0.2

So, z is a rational number.

On taking square root on both sides, we get

So, u is an irrational number because ā17 is irrational.

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