Exercice n°1 :9 points A = -5(6-x) D = (3x - 1)(3x + 1) Développer puis réduire 02:6 noints C = (-3x+2)(2x-3) B = (2x+3)(x - 5) E = (6x-2)(x − 3) + (x + 4) (x - 5)
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Bonsoir,
N'oublie pas la formule de politesse la prochaine fois ;)
A = -5(6-x)
A = - 30 + 5x
A = 5x - 30
D = (3x - 1)(3x + 1)
D = 9x² + 3x - 3x - 1
D = 9x² - 1
C = (-3x+2)(2x-3)
C = - 6x² + 9x + 4x - 6
C = - 6x² + 13x - 6
B = (2x+3)(x - 5)
B = 2x² - 10x + 3x - 15
B = 2x² - 7x - 15
E = (6x-2)(x − 3) + (x + 4) (x - 5)
E = 6x² - 18x - 2x + 6 + x² - 5x + 4x - 20
E = 7x² - 21x - 14
Bonne soirée.