Question

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

Answer 1

ANSWER :

(a+1)(a-1)(a² +1)

(a² - 1)(a² + 1). { using the identity of (a² - b²)}

(a⁴ - 1)

PLEASE MARK IT AS BRAINLIEST IF IT SATISFIED YOU!

Answer 2

Answer:

$(a^{4} - 1)$

Step-by-step explanation:

We have been given the expression:-

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

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

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

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

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

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

= $(a^{4} - 1)$

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