"Question 1 Find the product of the following pairs of monomials. (i) 4, 7p (ii) − 4p, 7p (iii) − 4p, 7pq (iv) 4p^3, − 3p (v) 4p, 0
Class 8 Algebraic Expressions and Identities Page 143"
Answers
Algebraic expressions:
A combination of constants and variables connected by any or all of the four fundamental operations +, -,×,÷ is called an algebraic expression.
Terms:
The different parts of the expression separated by the sign+ or – are called the terms of the expression.
Monomials:
A monomial is a one term algebraic expression .
Multiplication of algebraic expression:
The product of two factors with like signs is positive and the product of two factors with unlike signs is negative.
Multiplication of monomials:
The coefficient of the product of two monomials is equal to the product of their coefficients and the variable part in the product is equal to the product of the variable in the given monomials.
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Solution:
i)
4 x 7 p = (4 x7) (p) =28p
ii)
- 4p x 7p = (-4 x7) x (pxp)= -28p²
iii)
- 4p x 7pq = (-4 x7) x (pxp xq)=-28p²q
iv)
4p³ x - 3p = (4 x-3) x (p³xp)
=-12p⁴
v)
4p x 0 = 0
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Hope this will help you....
Answer:
don't know.................