6. Simplify
(a - 1)(a + 1)(a? + 1)
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Answer:
a^3-a+a^2-1
Step-by-step explanation:
(a-1) (a^2+1+2a)
a^3+a+2a^2-a^2-1-2a
a^3-a+a^2-1
hope it helps
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