Respostas

2014-06-13T10:46:54-03:00
Quadrado= x²                    dobro = 2x
x² - 2x = -1
x² - 2x +1 =0
2+/- √4-4    /2
2+/-0  / 2
2 +0 / 2=  1
2 - 0 /2 = 1
R=1

1 5 1