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

MCQ

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

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

✓

Answer

Correct option: C.

$(a^4 - 1)$

C. $(a^4 - 1)$
Solution:
$(a + 1)(a - 1)(a^2 + 1)$
$= (a^2- 1)(a^2+ 1)$
$= a^4- 1$

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