Respostas

2013-06-19T20:24:52-03:00

-x²-5x-6=0

 b² - 4 a.c

(-5)² - 4 (-1)(-6)=

25 - 24=1

 

x= 5+1/2= 3

 

x= 5-1/2=2

1 5 1