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Combination

Factories x2...

Question

Factories
$x^{2} + 2 x + 1$

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Solution

By splitting the middle term
$= x^{2} + x + x + 1$
$= x (x + 1) + 1 (x + 1)$
$= (x + 1) (x + 1)$
$= (x + 1)^{2}$

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