Tick ( ) the correct answer : (a+1)(a-1) (a^2+1 ) = ? - Vidyadip

MCQ

Tick $(\checkmark)$ the correct answer : $ (a+1)(a-1)\left(a^2+1\right) = ?$

A
$ \left(a^4-2 a^2-1\right) $
B
$ \left(a^4-a^2-1\right) $
✓
$ \left(a^4-1\right) $
D
$ \left(a^4+1\right) $

✓

Answer

Correct option: C.

$ \left(a^4-1\right) $

$ (a+1)(a-1)\left(a^2+1\right) $
$ =\left(a^2-1\right)\left(a^2+1\right) $
$ =a^4-1 $

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