Factorize : $4 x^{2} + 12 x + 5$

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Solution

$4 x^{2} + 12 x + 5 = 4 x^{2} + 10 x + 2 x + 5 = 2 x (2 x + 5) + 1 (2 x + 5) = (2 x + 1) (2 x + 5)$

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