Respostas

2013-12-11T23:13:46-02:00
1

x .  y . 1 . x . y
3 . 5 . 1 . 3 . 5 = 
2 . 4 . 1 . 2 . 4

5x + 2y + 12 -(10+4x+3y) = 
5x +2y +12 -10-4x-3y =
1x -1y + 2 = 0

2

3 . 5 . 1 . 3 . 5
2 . 3 . 1 . 2 . 3 =
2 . 1 . 1 . 2 . 1

9 + 10 +2 -(6+3+10) =
21 -6 -3 -10 =
21 -9-10 =
21 -19 =
2

2 / 2 =

1 u² a área 
1 5 1