Question
$(x + 1)$ is a factor of the polynomial:
✓
Answer
$x^3 + x^2 + x + 1$
$= x^3 (x + 1) + 1 (x + 1)$
$= (x^3 + 1) (x + 1)$
$= x^3 (x + 1) + 1 (x + 1)$
$= (x^3 + 1) (x + 1)$
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