Class 8 - Maths - Algebraic Expressions and Identities (NCERT Ex 9.2 Answers)

Algebraic Expressions and Identities 



(NCERT Ex 9.2 Answers)






Q1: Find the product of following pair of monomials.
(i) 4 , 7p

Answer:

4   ☓   7p = 4  ☓ 7   ☓ p = 28p

(ii) -4p , 7p

Answer:

-4p   ☓   7p = -4 ☓ p ☓ 7  ☓ p = (-4☓7)☓ (p☓ p) = -28p2

(iii) 4p , 7pq

Answer:

-4p  ☓ 7p = -4 ☓ p ☓7  ☓ p  ☓ q = (-4☓ 7)☓ (p☓ p☓ q) = -28p2q

(iv) 4p3 , -3p

Answer:

4p3  ☓  -3p =