Respostas

2013-12-07T21:42:43-02:00
X²+2ax+a² = 0
(x+a)² = 0
x+a = 0
x = -a
2013-12-08T08:34:53-02:00
X²+2ax+a² = 0
(x+a)² = 0
x+a = 0
x = -a