Respostas

2013-11-09T21:26:15-02:00
A.1 + b(-1) = -2
3.a.1 - 2.b.(-1) = -1

a - b = -2 .(2)
3a + 2b = -1

2a - 2b = -4
3a + 2b = -1
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5a = -5 --> a = -5/5 --> a = -1
a - b = -2
-1 - b = -2
-b = -2+1
-b = -1 .(-1)
b = 1
S: (-1;1)