Question

Resposta da esquacao do 2grau -x2+6x-5=0

Answer 1

-x²+6x-5=0
∆ = b² - 4.a.c
∆ = 6² - 4.(-1).(-5)
∆ = 36 - 20
∆ = 16

x = (- b ± √∆) / 2.a
x = (-6 ± √16) / 2.(-1)
x = (-6 ± 4) / -2

x' = (-6+4) / -2
x' = -2 / -2
x' = 1

x'' = (-6-4) / -2
x'' = -10 / -2
x'' = -5

S = {1 , -5}

Answer 2

-x²+6x-5=0
∆ = b² - 4.a.c
∆ = 6² - 4.(-1).(-5)
∆ = 36 - 20
∆ = 16

x = (- b ± √∆) / 2.a
x = (-6 ± √16) / 2.(-1)
x = (-6 ± 4) / -2

x' = (-6+4) / -2
x' = -2 / -2
x' = 1

x'' = (-6-4) / -2
x'' = -10 / -2
x'' = -5

S = {1 , -5}