Respostas

2014-02-13T19:50:44-02:00
4x=-x²-3
Delta = x²-4x-3= 0
a = -1
b = -4
c = -3

b²-4.a.c
(-4)²-4.(-1).(-3)
16 - 12
4

-(-4)+ √4 / 2.(-1)
 4+ 2 / 2(-1)
6 / -2
 = -3

-(-4)- 2 / 2.(-1)
2 / -2
-1

2 3 2