Add 3 7 and 5 7 . Check whether the sum is rational or irrational.

Like surds are those surds which has same radicand We have to add 3 7 and 5 7 . Both surds are like surds because their radicand is same i.e 7 So, 3 7 + 5 7 = 3 + 5 7 = 8 7 An irrational number is a real number that cannot be expressed as a ratio of integers Thus, 8 7 is an irrational number.

Subtract 4 5 from 7 5 . Is the answer rational or irrational?

Like surds are those surds which has same radicand We have to subtract 4 5 from 7 5 . Both surds are like surds because their radicand is same i.e 5 So, 7 5 - 4 5 = 7 - 4 5 = 3 5 An irrational number is a real number that cannot be expressed as a ratio of integers Thus, 3 5 is an irrational number.

E M B I B E

Mathematics Standard 9>Chapter 2 - Real Numbers>Solved Example

Tamil Nadu Board Solutions for Chapter: Real Numbers, Exercise 22: Solved Example

Author:Tamil Nadu Board

Tamil Nadu Board Mathematics Solutions for Exercise - Tamil Nadu Board Solutions for Chapter: Real Numbers, Exercise 22: Solved Example

Attempt the free practice questions on Chapter 2: Real Numbers, Exercise 22: Solved Example with hints and solutions to strengthen your understanding. Mathematics Standard 9 solutions are prepared by Experienced Embibe Experts.