Evaluate: (a+1)(a-1)(a²+1)
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Answer:
a^4-1
Step-by-step explanation:
firstly multiply (a+1)(a-1) by identity
a^2-b^2
a^2-(1)^2
(a^2-1)(a^2+1)
by the same identity
(a^2)^2-(1)^2
a^4-1
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