NCERT Solutions for Class 8 Maths Chapter 9
NCERT Solutions for Class 8 Maths Chapter 9 ALGEBRAIC EXPRESSIONS AND IDENTITIES Exercise 9.1, Exercise 9.2, Exercise 9.3, Exercise 9.4 and Exercise 9.5 in English and Hindi Medium updated for new academic session 2020-21.
Download Prashnavali 9.1, Prashnavali 9.2, Prashnavali 9.3, Prashnavali 9.4 and Prashnavali 9.5 in Hindi Medium to study online or in PDF form to free download for offline use. NCERT Solutions 2020-21 are updated for the new academic session 2020-2021 based on updated NCERT Books. Download options for Hindi and English Medium NCERT Solutions are given below.Page Contents
NCERT Solutions for Class 8 Maths Chapter 9
| Class: | 8 |
| Subject: | Maths – गणित |
| Chapter 9: | Algebraic Expressions and Identities |
Class 8 Maths Chapter 9 Solutions
Class 8 Maths Chapter 9 Algebraic Expressions and Identities all exercises in English Medium as well as Hindi Medium are given below to download in PDF form. All the solutions are done properly considering the latest CBSE Syllabus 2020-21.
8 Maths Chapter 9 Solutions in English Medium
8 Maths Chapter 9 Solutions in Hindi Medium
Important Terms about Class 8 Maths Chapter 9
Class 8 Maths Exercise 9.1 & 9.2 Solutions in Video
Class 8 Maths Exercise 9.3 & 9.4 Solutions in Video
Class 8 Maths Exercise 9.5 Solutions in Video
Using identities, evaluate 297 x 303.
297 x 303
= (300 – 3) x (300 + 3)
= 300^2 – 3^2 [ Using (a – b)(a + b) = a^2 – b^2]
= 90000 – 9
= 89991
Using identities, evaluate 78 x 82.
78 x 82
= (80 – 2) x (80 + 2)
= 80^2 – 2^2 [ Using (a – b)(a + b) = a^2 – b^2]
= 6400 – 4
= 6396
(6x – 7)(6x + 7) का गुणनखंड प्राप्त करने के लिए उचित सर्वसमिका का उपयोग कीजिए।
(6x – 7)(6x + 7)
= (6x)^2 – 7^2 [ सर्वसमिका (a – b)(a + b) = a^2 – b^2 के प्रयोग से]
= 36x^2 – 49
(1.1m – 0.4)(1.1m + 0.4) का गुणनखंड प्राप्त करने के लिए उचित सर्वसमिका का उपयोग कीजिए।
(1.1m – 0.4)(1.1m + 0.4
= (1.1x)^2 – 0.4^2 [ सर्वसमिका (a – b)(a + b) = a^2 – b^2 के प्रयोग से]
= 1.21x^2 – 0.16
In Chapter 9 Algebraic Expression and Identities, we have to learn about the fundamental terms like factors, coefficients, monomial, binomial, trinomial and all other polynomials, like and unlike terms in an algebraic expression, additions and subtractions of expressions taking like terms aside. Multiplications of two or three monomial and the multiplication of a monomial or binomial with a polynomial. Simplification of different polynomials using various identities. The following are the some standard identities:
1. (a – b)² = a² – 2ab + b²
2. (a + b)² = a² + 2ab + b²
3. (a + b)(a – b) = a² – b²
Do you know?
किसी भी बीजीय व्यंजक का गुणनखंड करने के लिए या सरल करने के लिए, सर्वसमिकाओं की विशेष आवश्यकता होती है। सर्वसमिकाएँ, व्यंजकों का गुणनखंड बनाने तथा गुणनखंड दो सरल करने में सहयोग देती है। बीजीय व्यंजक को सरलतम रूप में समझने के लिए हमें लगभग सभी सरसमिकाएँ याद होनी चाहिए।
