resolva as equações
A)y²-7y+12=0
b) x²+6x+8=0
Soluções para a tarefa
Respondido por
14
Olá, Gabrielfut10!
a) y² - 7y + 12 = 0
a = 1
b = -7
c = 12
Δ = b² - 4ac
Δ = (-7)² - 4.1.12
Δ = 49 - 48
Δ = 1
-b +- √Δ / 2.a
-(-7) +- √1 / 2.1
7 +- 1 / 2
x' = 7+1/2 = 8/2 = 4
x'' = 7-1/2 = 6/2 = 3
S = {4,3}
b) x² + 6x + 8 = 0
a = 1
b = 6
c = 8
Δ = b² - 4ac
Δ = 6² - 4.1.8
Δ = 36 - 32
Δ = 4
-b +- √Δ / 2.a
-6 +- √4 / 2.1
-6 +- 2 / 2
x' = -6+2/2 = -4/2 = -2
x'' = -6-2/2 = -8/2 = -4
S = {-2, -4}
a) y² - 7y + 12 = 0
a = 1
b = -7
c = 12
Δ = b² - 4ac
Δ = (-7)² - 4.1.12
Δ = 49 - 48
Δ = 1
-b +- √Δ / 2.a
-(-7) +- √1 / 2.1
7 +- 1 / 2
x' = 7+1/2 = 8/2 = 4
x'' = 7-1/2 = 6/2 = 3
S = {4,3}
b) x² + 6x + 8 = 0
a = 1
b = 6
c = 8
Δ = b² - 4ac
Δ = 6² - 4.1.8
Δ = 36 - 32
Δ = 4
-b +- √Δ / 2.a
-6 +- √4 / 2.1
-6 +- 2 / 2
x' = -6+2/2 = -4/2 = -2
x'' = -6-2/2 = -8/2 = -4
S = {-2, -4}
gabrielfut10:
Obrigado Matheusc
Respondido por
2
a) y²-7y+12=0
Δ=b²-4*a*c
Δ=(-7)²-4*1*12=
Δ=49-48
Δ=1
√Δ=1
y=-b+-√Δ
2a
y=-(-7)+-1
2*1
y'= 7+1 y"= 7-1
2 2
y'= 8/2 y"= 6/2
y'=4 y"= 3
b) x²+6x+8=0
Δ=6²-4*1*8
Δ= 36-32
Δ= 4
√Δ= 2
x= -6+-2
2
x'= -6+2 x"= -6-2
2 2
x'= -4/2 x"= -8/2
x'=-2 x"= 4
Δ=b²-4*a*c
Δ=(-7)²-4*1*12=
Δ=49-48
Δ=1
√Δ=1
y=-b+-√Δ
2a
y=-(-7)+-1
2*1
y'= 7+1 y"= 7-1
2 2
y'= 8/2 y"= 6/2
y'=4 y"= 3
b) x²+6x+8=0
Δ=6²-4*1*8
Δ= 36-32
Δ= 4
√Δ= 2
x= -6+-2
2
x'= -6+2 x"= -6-2
2 2
x'= -4/2 x"= -8/2
x'=-2 x"= 4
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