What is the difference of the polynomials?(5x3 + 4x2) – (6x2 – 2x – 9)

Distribute the subtraction sign across the second polynomial: (5x³ + 4x²) − (6x² − 2x − 9) = 5x³ + 4x² − 6x² + 2x + 9. Combine like terms to get 5x³ − 2x² + 2x + 9, which is choice D.

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