Respostas

2014-01-09T14:49:11-02:00
x²-5x+6=0     
Δ= 25- 4·6·1
Δ= 1

x'= 5 + 1/2
x'= 3

x''= 5-1/2
x''= 2
S:[2,3]

x²-4x-32=0      
Δ= 144

x'= 4 +12/2
x'= 8

x''= -4

S: [-4,8]

 x²-6x+5=0       
Δ= 16

x'= 6+ 4/2
x'= 5

x''= 1

S:[1.5]
1 5 1