NCERT Solutions for Class 7 Mathematics Chapter 12
Important NCERT Questions
Class vii Math Chapter 12 Algebraic Expressions Exercise 12.3
NCERT Books for Session 2022-2023
CBSE Board
Questions No: 4
If a = 2,b= -2, find the value of: (i) a²+b² (ii) a²+ab+b²
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(i) a²+b² = (2)²+(-2)² [Putting a = 2,b =-2 ]
= 4 + 4 = 8
(ii) a²+ab+b²
= (2)²+(2)(-2)+(-2)² [Putting a = 2,b =-2 ]
= 4 – 4 + 4 = 4
Class 7 Maths Chapter 12 Exercise 12.3
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