6. (a+1) (a-1) (a? +1) = ?
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Answer:
(a+1)(a-1)(a?+1)=?.
(a+1)(a-1).
It is in the form of (a+b)(a-b)=a²-b².
a=a. b=1.
Therefore (a+1)(a-1)=(a)²-(1)².
=(a²-1).
Therefore (a?+1)=(a²+1).
(a²+1)(a²-1).
It is in the form of (a+b)(a-b)=a²-b².
a=a². b=1.
(a²+1)(a²-1)=(a²)²-(1)².
=(a⁴-1).
Therefore (a+1)(a-1)(a²+1)=(a⁴-1).
I think this is your answer.
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a^4 - 1
hope it will help you
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