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
(iii) and
(iv) and
(v) and
(vi) 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)
=
=
=