bjr j'ai besoin d'aide pr mon devoir
1 exo : factoriser les expression : (2x²-3) (5x-4) - (4x²+5) (5x-4)
J'appelle l'expression A
A = (2x² - 3)(5x - 4) - (4x² + 5)(5x - 4)
A = (5x - 4)[(2x² - 3) - (4x² + 5)]
A = (5x - 4)(2x² - 3 - 4x² - 5)
A = (5x - 4)(-2x² - 8)
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J'appelle l'expression A
A = (2x² - 3)(5x - 4) - (4x² + 5)(5x - 4)
A = (5x - 4)[(2x² - 3) - (4x² + 5)]
A = (5x - 4)(2x² - 3 - 4x² - 5)
A = (5x - 4)(-2x² - 8)