Respostas

2013-09-13T09:03:07-03:00
4x2-12x+9=0  Delta é 0
x = 12 +- 0 /8 =
x =12/8
1 4 1
2013-09-13T09:06:35-03:00
4x 2 -12x +9=0
4x-12x= -9-2
8x=-11
x=  -11
        8
    
2 3 2