Réponse:
4x² - 9 + 4x(2x-3)
= 4x² - 9 + 8x² - 12x
= (2x-3) × ( 2x+3) + 4x × ( 2x-3)
= (2x-3) × ( 2x+3+4x)
= (2x-3) × ( 6x+3)
= (2x-3) × 3(2x+1)
= 3(2x-3) × (2x+1)
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Réponse:
4x² - 9 + 4x(2x-3)
= 4x² - 9 + 8x² - 12x
= (2x-3) × ( 2x+3) + 4x × ( 2x-3)
= (2x-3) × ( 2x+3+4x)
= (2x-3) × ( 6x+3)
= (2x-3) × 3(2x+1)
= 3(2x-3) × (2x+1)