Respostas

2013-11-21T21:14:29-02:00
2013-11-21T21:14:30-02:00
X² - 2x = -1
x² - 2x + 1 = 0
D (DISCRIMINANTE OU DELTA) = 2² - 4.1.1
D= 4-4
D= 0

x= -(-2) / 2.1
x= 2/2
x= 1
3 4 3