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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