Question

(a + 1) (a - 1) (a2 + 1) direct method to evaluate ​

Answer 1

Step-by-step explanation:

[a(a-1)+1(a-1)](a²+1)

(a²-a+a-1)(a²+1)

(a²-1)(a²+1)

a²(a²+1)-1(a²+1)

a⁴+a²-a²-1

a⁴-1

Answer 2

Answer:

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