Respostas

2014-02-13T20:22:15-02:00
2014-02-13T20:24:20-02:00
-x²+x+12= 0

a= -1
b= 1
c = 12

b²-4.a.c
(1)²-4.(-1).12
1+48
49


-b +/- Vdelta / 2.a
-1+ V49 / 2.(-1)
-1 + 7 / -2
6/ -2
 3

-1-7/ -2
-8/ -2
4