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Verified answer
Hasil Penjumlahan dari= 4x(2x² - 3x + 5) + 3x(4x² + 9x - 8)
= 8x³ - 12x² + 20x + 12x³ + 27x² - 24x
= 8x³ + 12x³ - 12x² + 27x² + 20x - 24x
= 20x³ + 15x² - 4x
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