# RBSE Solutions for Class 9 Maths Chapter 2 Number System Ex 2.2

RBSE Solutions for Class 9 Maths Chapter 2 Number System Ex 2.2 is part of RBSE Solutions for Class 9 Maths. Here we have given RBSE Rajasthan Board Solutions for Class 9 Maths Chapter 2 Number System Ex 2.2.

 Board RBSE Class Class 9 Subject Maths Chapter Chapter 2 Chapter Name Number System Exercise Ex 2.2 Number of Questions Solved 3 Category RBSE Solutions

## RBSE Solutions for Class 9 Maths Chapter 2 Number System Ex 2.2

Question 1.
Classify the following numbers (RBSESolutions.com) as rational or irrational.

Solution:
(i) 2 – √5 is an irrational number.
(ii) (3 + √23) – √23 = 3 + √23 – √23 = 3
Hence, it is (RBSESolutions.com) a rational number.
$$\frac { 2\sqrt { 11 } }{ 7\sqrt { 11 } } =\frac { 2 }{ 7 }$$
Hence, it a rational number.
(iv) $$\frac { 1 }{ \sqrt { 3 } }$$ is an irrational number.
(v) 2π is an irrational number.

Question 2.
Rationalist the (RBSESolutions.com) denominator of the following:

Solution:

Question 3.
$$\frac { 3+2\sqrt { 2 } }{ 3-\sqrt { 2 } } =a+b\sqrt { 2 }$$, where a and b are rational, then (RBSESolutions.com) find the values of a and b.
Solution:
$$\frac { 3+2\sqrt { 2 } }{ 3-\sqrt { 2 } } =a+b\sqrt { 2 }$$
Rationalizing the denominator of L.H.S. by multiplying and dividing by 3 + √2

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