Question

after solving (a+1) (a-1) we get​

Answer 1

Answer:

a²-1 is the answer.

Step-by-step explanation:

(a+1)(a-1)

= a²-1² (Using the identity (a+b)(a-b) = a²-b²

= a²-1

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Answer 2

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After solving (a+1)(a–1) we get :

(a+1)(a–1)

= a(a–1) +1(a–1)

= a² – a + a –1

= a² – 1