NCERT Class 9 Mathematics Solutions: Chapter 9 – Algebraic Expressions and Identities Exercise 9.1 Part 2

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Combine the given terms and find sum

Combine the Given Terms and Find Sum

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Question: 3 Add the following:

(i)

(ii)

(iii)

(iv)

Answer: 3

(i)

Hence the sum is 0.

(ii)

Hence the sum is

(iii)

Hence the sum is

(iv)

Hence, the sum is

Question: 4

(a) Subtract from .

(b) Subtract

(C) Subtract from

Answer:

(a) Subtract from .

While subtracting, we need to remember signs are reversed after sign once bracket is opened

(b) Subtract from

(c) Subtract from