Respostas

2013-03-15T14:42:00-03:00

Formula de baskaras.

 

Delta= b²-4ac

 

D= 9-4.1.2

 

D=9-8=1

 

-(b)+-1/2.a

 

3+-1/2

 

x'= 4/2=2

 

x"=2/2=1

 

R= As raízes são (1,2)

12 4 12
2013-03-15T14:43:46-03:00

^= b²-4.a.c 

^=-3²-4.1.2

^=9-8=1 ^=1

 

X= -b+/- 1

X= 3+1 /2= 2 

 

X= 3-1 /2 = 1   X{ 1 , 2 } 

10 3 10