Réponse:
a). 5 (2x+3)
5 × 2x + 5 × 3
10x + 15
b) 4 (3x - 5)
4 × 3x - 4 × 5
12x - 20
c). 3 (X+ 1) + 2(4x -6)
3 × X + 3 × 1 + 2 × 4x - 2 × 6
3x + 3 + 8x - 12
11x - 9
d). -6 (3x + 5)
- 6 × 3x + (-6) × 5
-18x + (-30)
e). -8 (5x - 2)
-8 × 5x - (-8) × 2
- 40x +16