- What is algebraic expression
- |
- Terms, Factors and Coefficients
- |
- Monomials, Binomials, trinomial and Polynomials
- |
- Like and Unlike Terms
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- Addition and Subtraction of Algebraic Expressions
- |
- Multiplication of Algebraic expression
- |
- What is an Identity

In this page we have *NCERT Solutions for Algebraic Expressions and Identities Class 8 Mathematics Chapter 9 * for
Exercise 9.4 . Hope you like them and do not forget to like , social share
and comment at the end of the page.

Multiply the binomials.

i) (2x + 5) and (4x – 3)

(ii) (y – 8) and (3y – 4)

(iii) (2.5l – 0.5m) and (2.5l + 0.5m)

(iv) (a + 3b) and (x + 5)

(v)

then

( a+b) (c+d)= a(c+d) + b( c+d)

=a x c+a x d+b x c+b x d

We will use the same concept in all the question below

i)

=

=

=

ii) ( y - 8)(3y - 4)

= y

= 3y

= 3y

Using (a+b)(a-b) = a

We get = 6.25l

v) 2pq

= 6p

Find the product.

(i) (5 – 2x) (3 + x)

(ii) (x + 7y) (7x – y)

iii) (a

(iv) (p

= 15 - x - x

ii) 7x

= 7x

iii) a

= a

= a

iv) 2p

= 2p

Simplify.

(i) (x

(ii) (a

(iii) (a + b) (c – d) + (a – b) (c + d) + 2 (ac + bd)

(iv) (x + y)(2x + y) + (x + 2y)(x – y)

(v) (x + y)(x

(vi) (1.5x – 4y)(1.5x + 4y + 3) – 4.5x + 12y

(vii) (a + b + c)(a + b – c)

i) x

= x3 + 5x

ii) a

= a

iii) (ac - ad + bc - bd) + (ac + ad - bc - bd) + (2ac + 2bd)

= ac - ad + bc - bd + ac + ad - bc - bd + 2ac + 2bd

= 4ac

iv) 2x

= 3x

v) x

= x

vi) 2.25x

= 2.25x

vii) a

= a

Download Algebraic Expressions Exercise 9.4 as pdf

Class 8 Maths Class 8 Science

Given below are the links of some of the reference books for class 8 Math.

- Mathematics Foundation Course for JEE/Olympiad : Class 8 This book can take students maths skills further. Only buy if child is interested in Olympiad/JEE foundation courses.
- Mathematics for Class 8 by R S Aggarwal Detailed Mathematics book to clear basics and concepts. I would say it is a must have book for class 8 student.
- Pearson Foundation Series (IIT -JEE / NEET) Physics, Chemistry, Maths & Biology for Class 8 (Main Books) | PCMB Combo : These set of books could help your child if he aims to get extra knowledge of science and maths. These would be helpful if child wants to prepare for competitive exams like JEE/NEET. Only buy if you can provide help to the child while studying.
- Reasoning Olympiad Workbook - Class 8 :- Reasoning helps sharpen the mind of child. I would recommend students practicing reasoning even though they are not appearing for Olympiad.

You can use above books for extra knowledge and practicing different questions.

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