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Classify the Following Numbers as Rational Or Irrational - Mathematics

Sum

Classify the following numbers as rational or irrational :-

` 2-sqrt5`

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Solution

`2-sqrt5`

2 is a rational number and sqrt5 is an irrational number.

`therefore 2-sqrt5 " is an irrational number."`

∴ The difference of a rational number and an irrational number is irrational.

Concept: Operations on Real Numbers
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Chapter 1: Number Systems - Exercise 1.5 [Page 24]
Q 1.1
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NCERT Class 9 Mathematics Textbook
Chapter 1 Number Systems
Exercise 1.5 | Q 1.1 | Page 24
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