esse IR significar equaçao iregular entao vc deve mostra quais sao que estao irregulares
formula: Δ = b² - 4 . a . c
a. Δ = (-7)² - 4 . 1 . 6
Δ = 49 - 24
Δ = 25
a. Δ = (-7)² - 4 . 1 . 6
Δ = 49 - 24
Δ = 25
x' = 7+5/2 x'' = 7-5/2
x' = 12 : 2 x'' = 2 : 2
x' = 6 x'' = 1
S= {1,6}

b. Δ = (-1)² - 4 . 1 . (-12)
Δ = 1 + 48
Δ = 49
x' = 1+7/2 x'' = 1-7/2
x' = 8/2 x'' = -6/2
x' = 4 x'' = -3
S= {4 - 3}
c. Δ = (-3)² - 4 . 1 . (-28)
Δ = 9 + 119
Δ = 121
x' = 3+11/2 x'' = 3-11/2
x' = 14 : 2 x'' = -8 : 2
x' = 7 x'' = -4

d. Δ = (-12)² - 4 . 1 . 36
Δ = 144 - 144
Δ = 0

e. Δ = (-1)² . 4 . 1 . (-1)
Δ = 1 + 24
Δ = 25
x' = 1+5/12 x'' = 1-5/12
x' = 6/12 x'' = -4/12
x' = 1/6 x'' = -1/3
S= {1/6 , 1/3}

f. Δ = 2² - 4 . 9 . 1
Δ = 4 - 36
Δ = -32
(não possui raizes reais)
g. Δ = (-7)² - 4 . 3 . 2
Δ = 49 - 24
Δ = 25
x' = 7+5/6 x'' = 7-5/6
x' = 12 : 6 x'' = 2/6
x' = 2 x'' = 1/3
S= {2, 1/3}

h. Δ = (-10)² - 4 . 25 . 1
Δ = 100 - 100
Δ = 0

Respostas

2014-04-22T15:45:42-03:00
Esse IR significar   equaçao iregular entao vc deve mostra quais sao que estao irregulares