Respostas

2014-04-14T20:01:21-03:00
E simples: X2 - 3x - 10 =0
a= 1      b= -3      c= -10

Delta= 9+40
Delta = 49

X1 = 3 +7/2 = 10/2 =5
X2 = 3 - 7/2 = -4/2 = -3
S=(-2 ; 5)