Question

factorize a^3 + a^2 + a + 1​

Answer 1

   $a^3+a^2+a+1$

$= a^2( a+1) + 1(a+1)$

$= (a^2+1)(a+1)$

(a²+1) is not factorisable further since it has complex roots

HOPE IT HELPS!!