$f (x) = x^{3} + 4 x^{2} + 5 x + 6$ find $f (5)$

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Solution

$f (x) = x^{3} + 4 x^{2} + 5 x + 6$
$f (5) = 5^{3} + 4 (5)^{2} + 5 (5) + 6 f (5) = 125 + 100 + 25 + 6 = 256$

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