Réponses

2014-09-21T14:19:34+02:00


A = 10 - [ -2 x (2 + (-3) ) + 5 ]

A = 10 - [ -2 x (-1) + 5 ]

A = 10 - [ 2 + 5 ]

A = 10 - 7

A = 3

2014-09-21T14:20:48+02:00
10 - [- 2 x (2 + (- 3)) + 5]
= 10 - (- 2 x (2 - 3 + 5)
= 10 - (- 2 x (7 - 3)
= 10 - (- 2 x 4)
= 10 - (- 8)
= 10 + 8
= 18