Articles
Register
Sign In
Search
VictoriaRuffo
@VictoriaRuffo
May 2020
1
95
Report
RESOLVA AS SEGUINTES EQUAÇÕES DO 2° GRAU:
A) _1_ = _ 3_ ₋ _1_ com x ∈ IR, x
0 e x
1.
x 2 x-1
B) _x_ ₋ _3_ = __ _3____ ( com x
∈ IR x=1 e x=2)
x-2 x-1 x - 2 ( x-1)
Please enter comments
Please enter your name.
Please enter the correct email address.
Agree to
terms and service
You must agree before submitting.
Send
Lista de comentários
eluciamonteiro
Verified answer
A
)
1
=
3
-
1
x 2 x-1 mmc = 2x(x-1)
2.(x-1) = 3x.(x-1) - 2x
2x(x - 1) elimina denominador 2x(x - 1)
2.(x-1) = 3x.(x-1) - 2x
2x - 2 = 3x² - 3x - 2x
2x² - 2x = 3x² - 5x
- 3x² + 2x + 5x - 2 = 0
- 3x² + 7x - 2 = 0 .(-1)
3x² - 7x + 2 = 0
a = 3 b = - 7 c = + 2
Δ = b² - 4.a.c
Δ = (-7)² - 4.(3).(+2)
Δ = 49 - 24
Δ = 25
x =
- b ± √Δ
2.a
x =
- (-7)
±
√25
2.3
x =
+ 7
± 5
6
x'=
7 + 5
=
12
=
2
6 6
x" =
7 - 5
=
2
÷
2
=
1
6 6 2
3
S[1/3 , 2]
B)
x
-
3
=
3
x-2 x-1 x-2(x-1) mmc= (x-2)(x-1)
x.(x-1) - 3.(x-2) = 3
(x-2)(x-1) elimina denominador (x-2)(x-1)
x.(x-1) - 3.(x-2) = 3
x² - x - 3x + 6 = 3
x² - x - 3x + 6 - 3 = 0
x² - 4x + 3 = 0
a = 1 b = - 4 c = + 3
Δ = b² - 4.a.c
Δ = (-4)² - 4.(1).(+3)
Δ = 16 - 12
Δ = 4
x =
- b ± √Δ
2.a
x =
- (-4)
± √4
2.1
x =
+ 4 ± 2
2
x'=
4 + 2
=
6
=
3
2 2
x" =
4 - 2
=
2
=
1
2 2
S[1 , 3]
2 votes
Thanks 1
More Questions From This User
See All
VictoriaRuffo
October 2020 | 0 Respostas
Responda
VictoriaRuffo
October 2020 | 0 Respostas
Responda
VictoriaRuffo
October 2020 | 0 Respostas
Responda
VictoriaRuffo
October 2020 | 0 Respostas
Responda
VictoriaRuffo
October 2020 | 0 Respostas
Responda
VictoriaRuffo
October 2020 | 0 Respostas
Responda
VictoriaRuffo
October 2020 | 0 Respostas
Responda
VictoriaRuffo
October 2020 | 0 Respostas
Responda
VictoriaRuffo
October 2020 | 0 Respostas
Responda
VictoriaRuffo
October 2020 | 0 Respostas
Responda
Recomendar perguntas
Deividyfreitas
May 2020 | 0 Respostas
BlackShot
May 2020 | 0 Respostas
Vanessakellen
May 2020 | 0 Respostas
Guiduarter
May 2020 | 0 Respostas
Mrzaine
May 2020 | 0 Respostas
O QUE SERIA AUTONOMIA?
Grazifer
May 2020 | 0 Respostas
Joazinho
May 2020 | 0 Respostas
a palavra rapidez formou se de qual derivacao
Celiana
May 2020 | 0 Respostas
Joazinho
May 2020 | 0 Respostas
Anatercia
May 2020 | 0 Respostas
×
Report "RESOLVA AS SEGUINTES EQUAÇÕES DO 2° GRAU:A) _1_ = _ 3_ ₋ _1_ com x ∈ IR, x 0 e x 1. x 2 x-1 B) _x.... Pergunta de ideia de VictoriaRuffo"
Your name
Email
Reason
-Select Reason-
Pornographic
Defamatory
Illegal/Unlawful
Spam
Other Terms Of Service Violation
File a copyright complaint
Description
Helpful Links
Sobre nós
Política de Privacidade
Termos e Condições
direito autoral
Contate-Nos
Helpful Social
Get monthly updates
Submit
Copyright © 2024 ELIBRARY.TIPS - All rights reserved.
Lista de comentários
Verified answer
A)1 = 3 - 1
x 2 x-1 mmc = 2x(x-1)
2.(x-1) = 3x.(x-1) - 2x
2x(x - 1) elimina denominador 2x(x - 1)
2.(x-1) = 3x.(x-1) - 2x
2x - 2 = 3x² - 3x - 2x
2x² - 2x = 3x² - 5x
- 3x² + 2x + 5x - 2 = 0
- 3x² + 7x - 2 = 0 .(-1)
3x² - 7x + 2 = 0
a = 3 b = - 7 c = + 2
Δ = b² - 4.a.c
Δ = (-7)² - 4.(3).(+2)
Δ = 49 - 24
Δ = 25
x = - b ± √Δ
2.a
x = - (-7) ± √25
2.3
x = + 7 ± 5
6
x'= 7 + 5 = 12 = 2
6 6
x" = 7 - 5 = 2 ÷ 2 = 1
6 6 2 3
S[1/3 , 2]
B) x - 3 = 3
x-2 x-1 x-2(x-1) mmc= (x-2)(x-1)
x.(x-1) - 3.(x-2) = 3
(x-2)(x-1) elimina denominador (x-2)(x-1)
x.(x-1) - 3.(x-2) = 3
x² - x - 3x + 6 = 3
x² - x - 3x + 6 - 3 = 0
x² - 4x + 3 = 0
a = 1 b = - 4 c = + 3
Δ = b² - 4.a.c
Δ = (-4)² - 4.(1).(+3)
Δ = 16 - 12
Δ = 4
x = - b ± √Δ
2.a
x = - (-4) ± √4
2.1
x = + 4 ± 2
2
x'= 4 + 2 = 6 = 3
2 2
x" = 4 - 2 = 2 = 1
2 2
S[1 , 3]