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= x (x² - 3x - 3) - 2 (x² - 3x - 3)
= x² - 3x² - 3x - 2x² - 6x + 6
= 3x² - 2x²-3x - 6x - x² + 6
= 6x pangkat 4 + 18x² - x² - 6
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