Respostas

2014-06-15T21:00:59-03:00
_+_ = -b/a --> -5
_x_= c/a ---> 6

Raizes sao -2 e -3

1 5 1
2014-06-15T23:57:07-03:00
X^2-5x+6=0

a=1
b=-5
c=6

Δ= b^2-4ac
Δ= 5^2-4*1*6
Δ= 25-24
Δ= 1

x= -b + √Δ / 2a

x'= -5+ √1 / 2*1 .... -5+1 / 2 ..... -4/2 = -2

x''= -5- √1 / 2*1 .... -5-1 / 2 .... -6/2 = -3


logo x' = -2 e x'' = -3