Respostas

2014-03-12T01:29:36-03:00
X²-2x+1=0

a= 1 b=-2 c=1

delta=b²-4ac

(-2)²-4.1.1
4-4
=0
x=-b+- raiz² / 2.a
x=2+-0 / 2
x'=2+0/2=1
x''=2-0/2=1 
S={1}
2 1 2