If f (x) = 3x2 + 6x + 12 and g (x) = x2 - 6x + 3, what is f (x) + g (x) ?
A. 2x^2 - 12x - 15
B. 4x^2 + 12x + 15
C. 4x^2 + 15
D. 2x^2 + 12x + 15
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Home » Mathematics » If f (x) = 3x2 + 6x + 12 and g (x) = x2 - 6x + 3, what is f (x) + g (x) ? A. 2x^2 - 12x - 15 B. 4x^2 + 12x + 15 C. 4x^2 + 15 D. 2x^2 + 12x + 15