Content Curator
NCERT Solutions for Class 7 Maths Chapter 12 Algebraic Expressions Exercise 12.3 is provided here. Algebraic identities are shortened form of certain commonly used algebraic expressions. Some of the very important algebraic identities are given below.
- (a + b)2 = a2 + 2ab + b2
- (a - b)2 = a2 - 2ab + b2
- (a + b) (a - b)= a2 – b2
- (x + a) (x + b) = x2 + (a + b) x + ab
- (a + b + c)2 = a2+ b2+ c2 +2ab + 2bc + 2ac
Download PDF: NCERT Solutions for Class 7 Maths Chapter 12 Exercise 12.3
Check other NCERT Solutions for Class 7 Maths Chapter 12:
- NCERT Solutions Class 7 Maths Exercise 12.1
- NCERT Solutions Class 7 Maths Exercise 12.2
- NCERT Solutions Class 7 Maths Exercise 12.4
Read More: NCERT Solutions for Class 7 Maths Chapter 12
Examples of Class 7 Chapter 12 Algebraic Expressions
| Ques 1. Expand (2x+3)2 Ans. We know that, (a + b)2 = a2 + 2ab + b2 Therefore, (2x+3)2 = 4x2 + 12x + 9 Ques 2. Expand (2x2 – 32) Ans. We know that, (a + b) (a - b)= a2 – b2 Therefore, (2x2 - 32) = (2x+3)(2x-3) |
Read More:
| Like and Unlike Terms | Number Systems | Addition And Subtraction Of Integers |
| Variables and Constants | Multiplication of algebraic terms | Bodmas rule |
Class 7 Maths Guides:
Comments