Use the Direct Method to Evaluate : (X+1) (X−1) - Mathematics

Use the direct method to evaluate :
(x+1) (x−1)

Sum

Note: (a+b) (a−b) = a² − b²

(x+1) (x−1) = (x)² − (1)²

= x²− 1

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Chapter 12: Identities - Exercise 12 (A) [Page 150]

Chapter 12 Identities
Exercise 12 (A) | Q 2.01 | Page 150

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