1.

Evaluate :(i) (a + 1) (a - 1) (a² + 1)​

Answer»

Answer:

(a^{4} - 1)

Step-by-step explanation:

We have been given the EXPRESSION:-

(a+1)(a-1)(a^{2}+1)

a^{2} - b^{2}= (a+b)(a-b)Using the IDENTITY :-

= (a^{2} - 1^2)(a^{2}+1)

= (a^{2} - 1)(a^{2} + 1)

a^2 - b^2 = (a+b)(a-b)Again using the identity :-

= [(a^{2})^{2} - 1^{2}]

= (a^{4} - 1)

(a^{4} - 1)So, it can be EVALUATED to   !


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