• Skip to main content
  • Skip to primary sidebar
  • Skip to footer
  • NCERT Solutions
    • NCERT Books Free Download
  • TS Grewal
    • TS Grewal Class 12 Accountancy Solutions
    • TS Grewal Class 11 Accountancy Solutions
  • CBSE Sample Papers
  • NCERT Exemplar Problems
  • English Grammar
    • Wordfeud Cheat
  • MCQ Questions

CBSE Tuts

CBSE Maths notes, CBSE physics notes, CBSE chemistry notes

NCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.2

NCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.2 are part of NCERT Solutions for Class 8 Maths. Here we have given NCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.2.

  • Algebraic Expressions and Identities Class 8 Ex 9.1
  • Algebraic Expressions and Identities Class 8 Ex 9.3
  • Algebraic Expressions and Identities Class 8 Ex 9.4
  • Algebraic Expressions and Identities Class 8 Ex 9.5
Board CBSE
Textbook NCERT
Class Class 8
Subject Maths
Chapter Chapter 9
Chapter Name Algebraic Expressions and Identities
Exercise Ex 9.2
Number of Questions Solved 5
Category NCERT Solutions

NCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.2

Ex 9.2 Class 8 Maths Question 1.
Find the product of the following pairs of monomials :
(i) 4, 7p
(ii) -4p, 7p
(iii) – 4p, 7pq
(iv) 4p3 , – 3p
(v) 4p, 0
Solution:
(i) 4 x 7p = (4 x 7) x p = 28p
(ii) – 4 p x 7p = (- 4 x 7) x (px P)
= -28p1 + 1 = – 28p2
(iii) -4px 7pq = (- 4 x 7) x (p x p x q)
= -28 p1+1q = – 28p2q
(iv) 4p3 x – 3p = (4 x – 3) x (p3 x p)
= – 12p3+1 = =-12p4
(v) 4p x 0 = (4 x 0) x p = 0 x p = 0

Ex 9.2 Class 8 Maths Question 2.
Find the areas of rectangles with the following pairs of monomials as their lengths and breadths respectively :
(p, q); (10m, 5n); (20x2, 5y2); (4x, 3x2); (3mn, 4np)
Solution:
We know that the area of a rectangle = l x b, where l = length and b = breadth.
Therefore, the areas of rectangles with pair of monomials (p, q); (10m, 5n); (20x2, 5y2); (4x, 3x2) and (3mn, 4np) as their lengths and breadths are given by
pxq=pq
10 m x 5n = (10 x 5) x (m x n) = 50 mn
20x2 x 5y2 = (20 x 5) x (x2 x y2) = 100x2y2
4x x 3x2 = (4 x 3) x (x x x2)
= 12x2
and, 3 mn x 4np = (3×4 )x(mxnxnxp)
=12 mn2p

Ex 9.2 Class 8 Maths Question 3.
Complete the table of products :
NCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities 6
Solution:
Completed table is as under :
NCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities 7

Ex 9.2 Class 8 Maths Question 4.
Obtain the volume of rectangular boxes with the following length, breadth and height respectively
(i) 5a, 3a2, 7a4
(ii) 2p, 4q, 8r
(iii) xy, 2x2y, 2xy2
(iv) a, 2b, 3c
Solution:
(i) Required volume = 5a x 3a2 x 7a4
= (5 x 3 x 7) x (a x a2 x a4)
= 105a1+2+4 =105a7

(ii) Required volume = 2p x 4q x 8r
= (2 x 4 x 8 )x p x q x r = 64 pqr

(iii) Required volume =xy x 2x2y x 2xy2
= (1 x 2 x 2) x (x x x2 x x x y x y x y2)
= 4x1+2+1 y1+1+2 = 4x4y4

(iv) Required volume =a x 2b x 3c
= (1 x 2 x 3) x (a x b x c)
= 6abc

Ex 9.2 Class 8 Maths Question 5.
Obtain the product of
(i) xy, yz, zx
(ii) a, – a2, a3
(iii) 2, 4y, 8y2, 16y3
(iv) a, 26, 3c, 6a6c
(v) m, – mn, mnp
Solution:
NCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities 8

We hope the NCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.2 help you. If you have any query regarding NCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.2, drop a comment below and we will get back to you at the earliest.

Primary Sidebar

NCERT Exemplar problems With Solutions CBSE Previous Year Questions with Solutoins CBSE Sample Papers

Recent Posts

  • Response to Stimuli Definition
  • Living Things Around Us
  • Different Types of Movements in Animals
  • Muscle Contractions Move Bones at Joints
  • Joints of the Body and their Types
  • The Old-Clock Shop Class 6 Questions And Answers CBSE
  • The Comet 2 Class 8 Questions And Answers CBSE
  • Functions of Skeleton in Human Body
  • The Shepherd’S Treasure Class 6 Questions And Answers CBSE
  • Skeleton : Framework of Bones
  • Children At Work Class 8 Questions And Answers CBSE
  • The Comet 1 Class 8 Questions And Answers CBSE
  • Parts of Flowers
  • How The Camel Got His Hump Class 8 Questions And Answers CBSE
  • The Friendly Mongoose Class 6 Questions And Answers CBSE

Footer

Maths NCERT Solutions

NCERT Solutions for Class 12 Maths
NCERT Solutions for Class 11 Maths
NCERT Solutions for Class 10 Maths
NCERT Solutions for Class 9 Maths
NCERT Solutions for Class 8 Maths
NCERT Solutions for Class 7 Maths
NCERT Solutions for Class 6 Maths

SCIENCE NCERT SOLUTIONS

NCERT Solutions for Class 12 Physics
NCERT Solutions for Class 12 Chemistry
NCERT Solutions for Class 11 Physics
NCERT Solutions for Class 11 Chemistry
NCERT Solutions for Class 10 Science
NCERT Solutions for Class 9 Science
NCERT Solutions for Class 7 Science
MCQ Questions NCERT Solutions
CBSE Sample Papers
NCERT Exemplar Solutions LCM and GCF Calculator
TS Grewal Accountancy Class 12 Solutions
TS Grewal Accountancy Class 11 Solutions