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= 8x² - 6x - 9
kedua 4x dikali -3 = -12x
ketiga, 3 × 2x = 6x
me empat 3 dikali -3 = -9
jadi, 8xpangkat 2 - 12x + 6x -9
biarkan yang angka biasa dengan angka biasa.
-12x + 6x = -6x
2 -9 = -7
jadi, -6x -7