(x+4)(3x+4)-(x+4) (3x+7)(2x+1)-(x-4)(2x+1) 4x²-9+(2x+3)(x-1)
Mathématiques
leodrevet
Question
(x+4)(3x+4)-(x+4)
(3x+7)(2x+1)-(x-4)(2x+1)
4x²-9+(2x+3)(x-1)
(3x+7)(2x+1)-(x-4)(2x+1)
4x²-9+(2x+3)(x-1)
1 Réponse
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1. Réponse Anonyme
(x + 4)(3x + 4) - (x + 4)
= (x + 4)(3x + 4 - 1)
= (x + 4)(3x + 3)
= 3(x + 4)(x + 1)
(3x + 7)(2x + 1) - (x - 4)(2x + 1)
= (2x + 1)(3x + 7 - x + 4)
= (2x + 1)(2x + 11)
4x² - 9 + (2x + 3)(x - 1)
= (2x - 3)(2x + 3) + (2x + 3)(x - 1)
= (2x + 3)(2x - 3 + x - 1)
= (2x + 3)(3x - 4)