Example 15 Chapter 1 Class 9 | Number System | Simplify the expressions | NCERT Maths

Example 15: Simplify the following expressions:
(i) (5 + √7)( 2 +√5 )
(ii) (5 +√5) (5- √5)
(iii) square of ( √3+√7)
(iv) (11 -√7) (11+√ 7)
In this tutorial, you will find the explanation of the following:
Class: 9th
Chapter: 1, Number Systems
Topic: Example 15
Textbook: NCERT
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----------------------------------- Class 9 Playlists -----------------------------
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Chapter 2: (Polynomials)
♦ Complete chapter - • Class 9 | Chapter 2 | ...
♦ All theorems - • Class 9 | Chapter 2 | ...
♦ Exercise 2.1, 2.2 - • Class 9 | Chapter 2 | ...
♦ Exercise 2.3, 2.4 - • Class 9 | Chapter 2 | ...
♦ Exercise 2.5 - • Class 9 | Chapter 2 | ...
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-------------------------------------- Geometry ------------------------------------
Chapter 6: (Lines and Angles)
♦ Complete chapter - • Class 9 | Chapter 6 | ...
♦ All theorems - • Theorem 6.1 Chapter 6 ...
♦ Exercise 6.1 - • Class 9 | Chapter 6 | ...
♦ Exercise 6.2 - • Class 9 | Chapter 6 | ...
♦ Exercise 6.3 - • Class 9 | Chapter 6 | ...
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Chapter 7 : (Triangles)
♦ Complete chapter - • Congruence v/s Similar...
♦ All theorems - • Class 9 | Chapter 7 | ...
♦ Exercise 7.1 - • Class 9 | Chapter 7 | ...
♦ Exercise 7.2 - • Class 9 | Chapter 7 | ...
♦ Exercise 7.3 - • Class 9 | Chapter 7 | ...
♦ Exercise 7.4 - • Class 9 | Chapter 7 | ...
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Chapter 8 : (Quadrilaterals)
♦ Complete chapter - • Section 8.2, Class 9 -...
♦ All theorems - • Theorem 8.1, chapter 8...
♦ Exercise 8.1 - • Question 1, Exercise 8...
♦ Exercise 8.2 - • Question 1 Exercise 8....
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Chapter 10 : (Circles)
♦ Complete chapter - • Class 9 | Chapter 10 |...
♦ All theorems - • Theorem 9.1 Class 9 | ...
♦ Exercise 10.1, 10.2, 10.3 - • Class 9 | Chapter 10 |...
♦ Exercise 10.4 - • 🔥🔥 Question 1 Exercise...
♦ Exercise 10.5 - • Example 1 Chapter 9 Cl...
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Chapter 12 (Heron's Formula)
Complete chapter - • HERON'S Formula deriva...
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Chapter 13 (Surface Areas and Volumes)
Complete chapter - • Introduction to Areas ...
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(5+√7)(2+√5)
(10+5√5+2√7+√35)
(10+5√5+2√7+√7*√5)
Iske baad solve karna chahee toh solve hoga kya.. humble request, please reply

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