Réponse:
A= 18x + 10 + 11 +17x
= 35x + 21
B = 30x² + 45x
= 5x ( 6x + 9)
C = 12x - 8x²
= 4x ( 3- 2x)
D = 42x² + 60x + 18x² + 30x
= 60x² + 90x
= 10x ( 6x + 9)
