NCERT Solutions for Class 8 Mathematics Chapter 9
Important NCERT Questions
Algebraic Expressions and Identities Chapter 9 Exercise 9.5
NCERT Books for Session 2022-2023
CBSE Board
Questions No: 2
Use the identity (x+a) (x+b)=x²+(a+b)x+ab to find the following products: (i) (x+3)(x+7) (ii) (4x+5)(4x+1)
Share
(i) (x+3)(x+7) = (x)²+(3+7)x+3×7
[Using identity(x+a)(x+b)=x²+(a+b)x+ab
x²+10x+21
(ii) (4x+5)(4x+1)=(4x)²+(5×1)4x+5×1
[Using identity(x+a)(x+b)=x²+(a+b)x+ab
= 16x²+6x4x+5=16x²+24x+5
Class 8 Maths Chapter 9 Exercise 9.5 Solution in Video
for more answers vist to:
https://www.tiwariacademy.com/ncert-solutions/class-8/maths/chapter-9/