Respostas

2014-09-01T14:27:21-03:00
X²-4x=0
-2²-4.(-2)
4+8
12
x²-4x=0
-1-4.(-1)
-1+4
3
x²-4x=0
0²-4.0
0-0
0
x²-4x=0
1-4.1
1-4
-3
x²-4x=0
2²-4.2
4-8
-4