Exercice2
1.8x-2+ 12x² + 11x - 3 = 12x² + 19x - 5
2. (4x-1)(x+5)
exercie 3
triangle rectangle CDG:
DG² = DC² + CG² = 20,25 + 36 = 56,25 => DG = 7,5
tgCDG = 4,5/6 => CDG = 37°
volume pyramide = 1/3.36.4.5 = 54cm³
