Write the quadratic function f (x) = x2 + 8x + 3 in vertex form.

A) f (x) = (x - 4) 2 - 13

B) f (x) = (x - 4) 2 + 3

C) f (x) = (x + 4) 2 + 3

D) f (x) = (x + 4) 2 - 13

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