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: 2
If p = -2, find the value of: (i) 4p+7 (ii) -3p²+4p+7
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(i) 4p + 7 = 4(-2)+7 [Putting p =-2 ]
= -8+7 = -1
(ii) -3p²+4p+7
= -3(-2)²+4(-2)+7 [Putting p =-2 ]
= -3×4-8+7
= -12-8+7
= -20+7 = -13
Class 7 Maths Chapter 12 Exercise 12.3
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