Réponses

2014-10-04T13:31:32+02:00
C = -4x (2x+3) + (2x+3) (9x-2)
=(2x+3)(-4x+9x-2)
=(2x+3)(5x+2)

D = -8x (5x-1) - 8x (12-x)
=-8x(5x-1+12+x)
=-8x(6x+11)