Réponses

2014-06-03T19:21:44+02:00
Développement
A = (4a+7) Xa +8 X (5a+9)+2a
4a² +7a +40a +72 +2a
4a² +49a +72

B = 6 -(-4+8-7)-19 +(-10 +3) +17
6 -(-3) -19 -7 +17
6 +3 -19 -7 +17
26 -26 = 0