Resposta:

x³ + 5x² + 16x + 43

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x - 3 | x⁴ + 2x³ + x² - 10x + 5

- (x⁴ - 3x³)

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5x³ + x²

- (5x³ - 15x²)

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16x² - 10x

- (16x² - 48x)

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38x + 5

- (38x - 114)

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119