Algebraic Expressions and Identities - Solutions 3
CBSE Class –VIII Mathematics
NCERT Solutions
CHAPTER - 9
Algebraic Expressions and Identities (Ex. 9.3)
NCERT Solutions
CHAPTER - 9
Algebraic Expressions and Identities (Ex. 9.3)
1. Carry out the multiplication of the expressions in each of the following pairs:
(i)
(ii)
(iii) 



(iv) 

(v) 

Ans.
(i) 

= 

(ii) 

= 

(iii)
= 


(iv)
= 


(v)
= 


= 0 + 0 + 0 = 0
2. Complete the table:
First expression
|
Second expression
|
Product
| |
(i)
| ![]() | ![]() |
…..
|
(ii)
| ![]() | ![]() |
…..
|
(iii)
| ![]() | ![]() |
…..
|
(iv)
| ![]() | ![]() |
…..
|
(v)
| ![]() | ![]() |
…..
|
Ans.
First expression
|
Second expression
|
Product
| |
(i)
| ![]() | ![]() | ![]() = ![]() = ![]() |
(ii)
| ![]() | ![]() | ![]() = ![]() = ![]() |
(iii)
| ![]() | ![]() | ![]() = ![]() = ![]() |
(iv)
| ![]() | ![]() | ![]() = ![]() = ![]() |
(v)
| ![]() | ![]() | ![]() = ![]() = ![]() |
3. Find the product:
(i) 

(ii) 

(iii) 

(iv) 

Ans.
(i) 


= 

(ii)

=

= 

(iii)

= 

= 

(iv)
=


4. (a) Simplify:
and find values for

(i)

(ii) 

(b) Simplify:
and find its value for

(i)

(ii)

(iii) 

Ans. (a) 


= 

(i) For 


= 


(ii) For 


=

= 

= 

(b) 


= 

(i) For 


= 

= 0 + 0 + 0 + 5 = 5
(ii) For 


= 

= 1 + 1 + 1 + 5 = 8
(iii) For 


= 

=
=
=4


5. (a) Add:
and 


(b) Add:
and 


(c) Subtract:
from 


(d) Subtract:
from 


Ans. (a)

= 

= 

(b)

= 

= 

= 

(c)

= 

= 

= 

(d) 

= 

= 

= 

= 

= 

= 
