Respostas

2014-07-04T01:17:00-03:00
A) -6
2-4x
2-8 = -6
b) -2 
2-4x
2-4 = -2
c) 2
2-4x
2-0 = 2
d) 6
2-4x
2-4*(-1) = 2+4 = 6
e) 10
2-4x
2-4*(-2) = 2+8 = 10
2014-07-04T01:20:36-03:00
A, 2-4*2= 2-8= 6
b, 2-4*1= 2-4= 2
c, 2-4*0= 2-0= 0
d, 2-4*(-1)= 2- (-4)= 6
e, 2-4*(-2)= 2- (-8)= 10