Respostas

2014-05-12T21:08:25-03:00
3x²+2x=1
3x²+2x-1=0
∆=2²-4(3)(-1)=
4+12=16
x=(-2±√16)/6
x=(-2+4)/6
x=2/6
2/6=1/3
2014-05-12T23:11:59-03:00
3x²+6x² = 1
9x² = 1
x = √1/9
x = 1/3