Question
Simplify by using formula :$(1 + a) (1 - a) (1 + a^2)$
✓
Answer
$(1 + a) (1 - a) (1 + a^2)$
$= [(1)^2 - (a)^2] (1 + a^2)$
$= (1 - a^2) (1 + a^2)$
$($Using identify $: (a + b)(a - b) = a^2 - b^2)$
$= (1)^2 - (a2)^2$
$= 1 - a^4.$
$= [(1)^2 - (a)^2] (1 + a^2)$
$= (1 - a^2) (1 + a^2)$
$($Using identify $: (a + b)(a - b) = a^2 - b^2)$
$= (1)^2 - (a2)^2$
$= 1 - a^4.$
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