Gente alguém sabe responder essas questões ? preciso muito delas respondidas mim ajudeem ❤
Respostas
a)
Δ = b² - 4.a.c
Δ = (-6²) - 4 . 1 . 5
Δ = 36 - 4. 1 . 5
Δ = 16
x = (-b +- √Δ)/2a
x' = -(-6 + √16)/2.1 x'' = -(-6 - √16)/2.1
x' = 10 / 2 x'' = 2 / 2
x' = 5 x'' = 1
b)
Δ = b - 4.a.c
Δ = (-6)² - 4 . 1 . 8
Δ = 36 - 4. 1 . 8
Δ = 4
x = (-b +- √Δ)/2a
x' = -(-6 + √4)/2.1 x'' = -(-6 - √4)/2.1
x' = 8 / 2 x'' = 4 / 2
x' = 4 x'' = 2
c)
Δ = b² - 4.a.c
Δ = (-4)² - 4 . 4 . 3
Δ = 16 - 4. 4 . 3
Δ = -32
d)
Δ = b² - 4.a.c
Δ = (-12)² - 4 . 1 . 35
Δ = 144 - 4. 1 . 35
Δ = 4
x = (-b +- √Δ)/2a
x' = -(-12 + √4)/2.1 x'' = -(-12 - √4)/2.1
x' = 14 / 2 x'' = 10 / 2
x' = 7 x'' = 5
e)
Δ = b2 - 4.a.c
Δ = -82 - 4 . 9 . 1
Δ = 64 - 4. 9 . 1
Δ = 28
x = (-b +- √Δ)/2a
x' = -(-8 + 2√7)/2.9 x'' = -(-8 - 2√7)/2.9
x' = 8 + 2√7 / 18 x'' = 8 - 2√7 / 18
f)
Δ = b² - 4.a.c
Δ = (-4)² - 4 . 1 . 4
Δ = 16 - 4. 1 . 4
Δ = 0
x = (-b +- √Δ)/2a
x' = -(-4 + √0)/2.1
x' = 4 / 2
x' = 2 x'' = 2
g)
Δ = b² - 4.a.c
Δ = 2² - 4 . 1 . 2
Δ = 4 - 4. 1 . 2
Δ = -4
h)
Δ = b² - 4.a.c
Δ = 3² - 4 . 1 . -10
Δ = 9 - 4. 1 . -10
Δ = 49
x = (-b +- √Δ)/2a
x' = (-3 + √49)/2.1 x'' = (-3 - √49)/2.1
x' = 4 / 2 x'' = -10 / 2
x' = 2 x'' = -5
i)
Δ = b² - 4.a.c
Δ = 15² - 4 . 5 . 0
Δ = 225 - 4. 5 . 0
Δ = 225
x = (-b +- √Δ)/2a
x' = (-15 + √225)/2.5 x'' = (-15 - √225)/2.5
x' = 0 / 10 x'' = -30 / 10
x' = 0 x'' = -3