Bonjour,
Développer, réduire et ordonner les expressions suivantes :
A (x) = (x+6)(x-5) + 3x +5(2-3x)
A (x) = x² - 5x + 6x - 30 + 3x + 10 - 15x
A (x) = x² - 5x - 15x + 6x + 3x - 30 + 10
A (x) = x² - 11x - 20
B (x) = (5x - 1)² + (3x-5)(3x+5) - (5x-9)
B (x) = 25x² - 10x + 1 + 9x² - 25 - 5x - 9
B (x) = 25x² + 9x² - 10x - 5x + 1 - 25 - 9
B (x) = 34x² - 15x - 33
Factoriser les expressions suivantes :
C(x) = (x+2)(x-5)+(x-5)(6x-8)
C (x) = (x - 5) (x + 2 + 6x - 8)
C (x) = (x - 5) (x + 6x + 2 - 8)
C (x) = (x - 5) (7x - 6)
D(x) = (5x - 4)(7x-5) - (5x-4)
D (x) = (5x - 4) (7x - 6)
E(x) = x² - 25 - (x+5)(2x+7)
E (x) = (x - 5) (x + 5) - (x + 5) (2x + 7)
E (x) = (x - 5) [(2x + 7) - (x + 5)]
E (x) = (x - 5) (2x + 7 - x + 5)
E (x) = (x - 5) (x + 12)
