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Sagot :

Réponse :

Hello,

→ A = (3x - 5) (x + 1)

→ A = (3x - 5) * x + (3x - 5) * 1

→ A = 3x² - 5x + 3x - 5

→ A = 3x² - 2x - 5

→ B = (x - 6)

→ B = x - 6

Voila

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