Réponses

2014-01-06T20:05:11+01:00
Bonsoir

A) 22x² +25x +4 = 25x² +20x +4 - 3x² +5x
22x² +25x +4 = 22x² +25x +4

B) (x+5)(3x-2)+ (x+5)(5x-4) =(x + 5) (8x -6)
3x² - 2x +15x -10 + 5x² -4x +25x -20 = 8x² -6x +40x -30
8x² +34x -30 = 8x² + 34x -30