Bonjour
Développer, réduire et ordonner les expressions suivantes :
A = (2x - 3)(4x + 5)
A = 8x² + 10x - 12x - 15
A = 8x² - 2x - 15
B = 4 - 2(3x - 4)
B = 4 - 6x + 8
A = - 6x + 12
C = 3x + (5x - 4)
C = 3x + 5x - 4
C = 8x - 4
D = 2 - (4 + 2x)
D = 2 - 4 - 2x
D = - 2x - 2
E = x(5x - 1) - (2x + 1)(3 + 2x)
E = 5x² - x - (6x + 4x² + 3 + 2x)
E = 5x² - x - 6x - 4x² - 3 - 2x
E = 5x² - 4x² - x - 6x - 2x - 3
E = x² - 9x - 3.
