Réponses

Meilleure réponse !
2013-12-07T13:04:30+01:00
A) -3(-2)²-5x7
=-3*4-35
=-12-35

b) -3(-2-5)²x7
=-3*(-7)²*7
=-3*49*7
=-1029

c) (-3(-2))²-5x7
=(3*2)²-35
=6²-35
=36-35
=1

d) (-3(-2)-5)²x7
=(3*2-5)²*7
=(6-5)²*7
=1²*7
=1*7
=7

* est le signe x multiplié