Respostas

2014-05-13T22:16:36-03:00
A)2x² - 4x - 5 =0
a=2 b=-4 c=-5

b)3x² -5x -10 =0
a=3 b= -5 c=-10

c)3x² - 13x +8 = 0
a=3 b=-13 c=8

d)5x² -18 = 0
a=5 b=0 c=-18
1 3 1