Algebraic Expressions and Identities - Solutions 4
CBSE Class –VIII Mathematics
NCERT Solutions
CHAPTER - 9
Algebraic Expressions and Identities (Ex. 9.4)
NCERT Solutions
CHAPTER - 9
Algebraic Expressions and Identities (Ex. 9.4)
1. Multiply the binomials:
(i) (2x+5) and (4x-3)
(ii) 
and 
and
(iii) 
and 
and
(iv) 
and 
and
(v) 
and 
and
(vi) 
and 
and
Ans.
(i) 
= 
= 
= 
(ii) 
= 
= 3y2 - 4y - 24y + 32
= 3y2 - 28 y + 32
(iii) 
= 2.5l x 2.5l + 2.5l x 0.5m - 0.5m x 2.5l - 0.5m x0.5m
= 
= 
(iv) 
= 
= 
(v) 
= 
= 
= 
= 
(vi) 
= 
= 
= 
2. Find the product:
(i) 
(ii) 
(iii) 
(iv) 
Ans. (i)
= 
= 
= 
=
(ii)
= 
= 
= 
(iii)
= 
= 
(iv)
= 
= 
3. Simplify:
(i) 
(ii) 
(iii) 
(iv) 
(v) 
(vi) 
(vii) 
(viii) 
Ans. (i) 
= 
= 
= 
(ii) 
= 
= 
= 
(iii) 
= 
= 
(iv) 
= 
= 
= 
= 
(v) 
= 
= 
= 
(vi) 
= 
= 
= 
(vii) 
= 
= 
= 
(viii) 
= 
= 
= 
