NCERT Class 9 Mathematics Solutions: Chapter 9 – Algebraic Expressions and Identities Exercise 9.3 Part 3

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Product of a sum and difference

Product of a Sum and Difference

Question 4:

(a) Simplify: and find values for

(b) Simplify: and find its value for

Answer:

(a)

, put the value of

Put the value of

(b)

(i) For,

(ii) For

(iii) For

Question 5:

(a) Add:

(b) Add:

(c) Subtract:

(d) Subtract:

Answer: 5

(a)

(b)

=

(c)

(d)