Question

(a + 1) (a -1) (a2 + 1)​

Answer 1

Step-by-step explanation:

Using,

(a+b)(a-b) = a²-b²

(a+1)(a-1)(a²+1)

= (a²-1)(a²+1)

= a⁴-1

Answer 2

Answer:

(a+b)(a-b) = a²-b

(a+1)(a-1)(a²+1)

= (a2-1)(a2+1)

= a4-1