Respostas

2014-08-20T19:20:42-03:00
-x^2-3x-2=0.........(* -1) 

x² + 3x +2 = 0 
Δ=b²-4.a.c = 9-8= 1 ....=> √Δ=1 
x=(-b±√Δ)/2a 
x'=(-3+1)/2 = (-2)/2 = -1 
x''=(-3-1)/2 = (-4)/2 = -2..........=> S: {-2, -1}
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