Réponses

2014-10-28T07:46:11+01:00
(-a) x (-b) = ab = -3
6ax(-b) = - 6 ab = -6 x -3 = 18
-2 x 5b = -10 b (impossible il manque a)
a carré b carré = ab x ab = -3 x -3 = 9
-2a×5b = -2x5xab = -10x(-3) = 30
-2a x 5b = -10 ab = -10 x -3 = 30
Hahaha ^^
merci beaucoup
dr