Respostas

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2013-11-25T10:10:17-02:00
Delta : b^2 -4ac = 4 -4.1.-3 = 4+12=16
Xv= -b/2a= -(-2)/2.1= 2/2= 1
Yv= - Delta/4a = -16/4.1 = -4
V(1,-4)