Find the sum of x² + 2x + 3 and ½x² + ¼x³ + 3x - 5.

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• A 1/4 x³ + 3/2 x² + 10
• B 1/4 x³ - 2x² + 3x - 2
• C 3/2 x² + 5x - 2
• D 1/4 x³ + 3/2 x² + 5x - 2

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Answer: D. 1/4 x³ + 3/2 x² + 5x - 2

Add like terms: ¼x³ + (x² + ½x²) + (2x + 3x) + (3 - 5) = 1/4 x³ + 3/2 x² + 5x - 2.

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