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State whether the following is irrational. 2sqrt(5) - Mathematics

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Question

State whether the following is irrational.

`2sqrt(5)`

Sum
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Solution

`2sqrt(5)`

`sqrt(5)` is irrational.

Rational × Irrational = Irrational

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Chapter 1: Rational and Irrational Numbers - EXERCISE 1B [Page 11]

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B Nirmala Shastry Mathematics [English] Class 9 ICSE
Chapter 1 Rational and Irrational Numbers
EXERCISE 1B | Q 3. (i) | Page 11
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