Réponses

2014-04-06T09:35:40+02:00
Développer et réduire les expressions

E = 3a (2a - 2). 
E = 6a² - 6a

F = -3 (5x + 2) + 5 (x - 3)
F = - 15x - 6 + 5x - 15
F =  -10x - 21

G = (-x + 4) (4x - 5) .
G =  -4x² + 5x + 16x - 20
G = -4x² + 21x - 20

H = (3 - 3/8x) (8 - 2x)
H = 24 - 6x - 24/8x + 6/8x²
H = 6/8x² - 48/8x  - 24/8x + 24
H = 6/8x² - 72/8x + 24
H = 6/8x² - 9x + 24