Question

$(a - 1)(a + 1)(a2 + 1)$
(a-1)(a+1)(a2+1)​

Answer 1

✦✧✧ Answer ✧✧✦

$(a - 1) \times (a + 1) \times (a \times 2 + 1)$

$use \: (a - b) (a + b) = {a}^{2} - {b}^{2}$

to simplify the product

$( {a}^{2} - 1) \times (a \times 2 + 1)$

Use the Commutative Property to record terms

$( {a}^{2} - 1) \times (2a + 1)$

Multiply the Parentheses

$2 {a}^{3} + {a}^{2} - 2a - 1$