Answer:
3x³ + 16x² + 12x - 16
Explanation:
(x - -4)(3x² + 4x - 4)
(x + 4) (3x² + 4x - 4)
3x³ + 4x² - 4x + 12x² + 16x - 16
3x³ + 4x² + 12x² - 4x + 16x - 16
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