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Show that x is irrational, if x2 = 27. - Mathematics

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Question

Show that x is irrational, if x2 = 27.

One Line Answer
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Solution

x2 = 27

x = `sqrt27`

x = `sqrt(3 xx 3 xx 3)`

x = `3sqrt3`

It is a Irrational.

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Chapter 1: Rational and Irrational Numbers - Exercise 1 (D) [Page 23]

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Selina Concise Mathematics [English] Class 9 ICSE
Chapter 1 Rational and Irrational Numbers
Exercise 1 (D) | Q 11. (iii) | Page 23
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