Respostas

2013-10-02T13:04:57-03:00
A)4.(-2)²+3
4.4+3
16+3 = 19
b)2.3+3.3
6+9 = 15
c)4.(-2)-(-2)²
4.(-2).-4
-8.-4
32
2013-10-02T13:06:06-03:00
a = 4; b = - 2; c = 3 

a)ab² + c
4.(-2)² + 3
4.4 + 3
16 + 3
= 19

b)2c + c
2.3 + 3
6 + 3
= 9

c)ab - b²
4.(-2) - (-2)²
- 8 - 4
= - 12