Respostas

2014-07-13T16:07:41-03:00
X^2+2x+1=0  
a=1; b=2; c=1 
Δ= b^2-4.a.c
Δ= 2^2-4.1.1
Δ= 4-4
Δ=0
X=-b+/-V0/2
X'= -2+0/2 =
= -2/2 = -1
X"= -2-0/2 =
=-2/2= -1

 



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