Respostas

2012-12-07T14:58:20-02:00

a) |-7+12|-|-6|=|+5|-|-6|=5-6=-1

b) |-6|+5-|9-17|-2*|-8|=6+5-|-8|-2*8=11-8-16=-13

c) |2|*|-4|+7=2*4+7=8+7=15

 

Isso com base em: |x|=+x e |-x|=+x

2012-12-07T20:00:30-02:00

a)5- 6 = -1

B) 6 +5+8 -16  = 19-16 =3

C) 2*4+7 = 15

 

Supondo que I-xI = x