Bonsoir, Factoriser les expressions suivantes : A = (2x-3)(x+1)-5(4x-6) et B = 16x²-1-(4x-1)(x-3) Merci
Mathématiques
unknowx
Question
Bonsoir,
Factoriser les expressions suivantes :
A = (2x-3)(x+1)-5(4x-6)
et
B = 16x²-1-(4x-1)(x-3)
Merci
1 Réponse
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1. Réponse Anonyme
Bonsoir,
A = (2x - 3)(x + 1) - 5(4x - 6)
= (2x - 3)(x + 1) - 5 * 2(2x - 3)
= (2x - 3) [(x + 1) - 5 * 2]
= (2x - 3) (x + 1 - 10)
= (2x - 3) (x - 9)
B = 16x² - 1 - (4x -1)(x - 3)
= [(4x)² - 1²] - (4x -1)(x - 3)
= (4x - 1)(4x + 1) - (4x -1)(x - 3)
= (4x - 1) [(4x + 1) - (x - 3)]
= (4x - 1) (4x + 1 - x + 3)
= (4x - 1)(3x + 4)