Réponses

2014-09-10T17:15:24+02:00
3a(2a-7) + 5a(-4a+2)
6a²-21a-20a²+10a
-14a²-11a


(7a-1) * 2a -4a(2a-5)
14a²-2a-8a²+20a
6a²+18a

(4a-5)(a-2)-(2a+9)(3a-1)
4a²-8a-5a+10 - (6a²-2a+27a-9)
4a²-13a+10-6a²+2a-27a+9
4a²-13a+10-6a²-25a+9
-2a²-38a+19