Respostas

2014-03-26T16:58:23-03:00
-(-9)+√81- 4.5. (-2) / 2.5
9 + 9 + 40 / 10
58/10
5,8
2 1 2
2014-03-26T16:58:42-03:00
X = -(-9) +  √ 9² - 4*5*(-2) / 2*5
 
x = 9 + √ 81-40 /10
 
x = 9 + √ 121 /10
 
x= 9 + 11 /10
 
x= 20 / 10
 
x = 2
 
Solução x = 2
3 5 3