Réponses

2012-12-16T17:18:42+01:00
2012-12-16T18:01:22+01:00

 A=2x -3+4x²+7-5x+x²

A= 2x - 5x - 3 + 7 + 4x² + x² 
A = -3x + 4 + 5x²