Réponses

2013-11-03T14:22:06+01:00
 A= 7x - 8y² + 5 - 3y + 5x² - 10x + y + 2y² - 11
= -8y²+2y²+5x²+7x-10x+y-3y-11+5
= -6y²+5x²-3x-2y-6
2013-11-03T14:23:16+01:00
 A= 7x - 8y² + 5 - 3y + 5x² - 10x + y + 2y² - 11
A = - 6 - 3x + 5x² - 2y - 6y²