Réponses

2013-11-03T15:30:39+01:00
Bonjour

A = 5(x+3) - (4x -2) + (7-2x )
A = 5x +15 - (28x -8x² -14 +4x)
A = 5x +15 -28x +8x² +14 - 4x
A = 8x² -27x +29

B = (3x+2)² +5 ( 4x -7)
B = 9x² +12x +4 + 20x - 35
B = 9x² +32x - 31

C = (7x-3)(7x+3) + (5x -3)²
C = 49x² -9 + 25x² - 30x +9
C = -24x² -30x

D = (2x-3)² + (x-1)(x+1)
D = 4x² -12x +9 + (x² -1)
D = 4x² -12x +9 +x² -1
D = 5x² -12x +8

PGCD de 703 et 209
703 = 3 x 209 + 76
209 = 2 x 76 + 57
76 = 1 x 57 + 19
57 = 3 x 19 + 0
donc PGCD = 19

209/703 = 11/37