f(x) = 2x² + 3
f(x + 1) = 2(x + 1)² + 3
f(x + 1) = 2(x² + 2x + 1) + 3
f(x + 1) = 2x² + 4x + 2 + 3
f(x + 1) = 2x² + 4x + 5
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Answer: 2x² + 4x + 5 (Answer D)
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