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Meilleure réponse !
2013-05-08T15:12:17+02:00

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