Articles
Register
Sign In
Search
Michlc
@Michlc
May 2020
2
78
Report
Resolva pf estas equações de 2º grau(com calculo)
a)
b)
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
x.(x - 2) = 1 - 2x
a) x² - 2x = 1 - 2x
x² - 2x + 2x - 1 = 0 cancela - 2x + 2x
x² - 1 = 0
x² = + 1
x = ± √1
x =
± 1
S[- 1 , + 1]
b)
2x
² + 5
+
1
=
5x² - 1
2 6 3 mmc (2,3,6) = 6
3.(2x² + 5) + 1 = 2.(5x² - 1)
6 elimina denominador 6
3.(2x² + 5) + 1 = 2.(5x² - 1)
6x² + 15 + 1 = 10x² - 2
6x² - 10x² + 15 + 1 + 2= 0
- 4x² + 18 = 0 .(-1)
4x² - 18 = 0 ÷ (2)
2x² - 9 = 0
2x² = 9
x = ±
√9
√2
x = ±
3
× √2 =
3√2
=
3√2
√2 √2 √4 2
S[- 3√2/2 , + 3√2/2]
2 votes
Thanks 1
michlc
mt obrigada :D
eluciamonteiro
De nada! Obrigada de marcar "a melhor"! :)
laurelidb
A) x(x-2) = 1 -2x
x² -2x = 1 -2x
x² -2x +2x=1
x²=1
x=+ou -1
b)
2x² + 5
+ 1/6 =
5x² -1
mmc=6
2 3
3(2x² + 5) + 1 = 2 (5x² -1)
6x² + 15 +1 = 10x² -2
6x² -10x²= -1 -2 -15
-4x²=-18 (-1)
4x²= 18
x²= 18/4
x=√18/4simplificando √9/2
x= √9/2 = √9/√2
√9
=
3 .√2
=
3.√2
√2 √2 . √2 2
+ ou -
3√2
2
1 votes
Thanks 1
More Questions From This User
See All
michlc
October 2020 | 0 Respostas
Responda
Michlc
May 2020 | 0 Respostas
Por que havia conflito entre colonos e religiosos?
Responda
Michlc
May 2020 | 0 Respostas
Responda
Michlc
May 2020 | 0 Respostas
Responda
Michlc
April 2020 | 0 Respostas
Responda
Michlc
April 2020 | 0 Respostas
Responda
Michlc
April 2020 | 0 Respostas
Responda
Michlc
April 2020 | 0 Respostas
Responda
Michlc
April 2020 | 0 Respostas
Responda
Michlc
April 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 pf estas equações de 2º grau(com calculo)a) b).... Pergunta de ideia de Michlc"
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
x.(x - 2) = 1 - 2xa) x² - 2x = 1 - 2x
x² - 2x + 2x - 1 = 0 cancela - 2x + 2x
x² - 1 = 0
x² = + 1
x = ± √1
x = ± 1
S[- 1 , + 1]
b) 2x² + 5 + 1 = 5x² - 1
2 6 3 mmc (2,3,6) = 6
3.(2x² + 5) + 1 = 2.(5x² - 1)
6 elimina denominador 6
3.(2x² + 5) + 1 = 2.(5x² - 1)
6x² + 15 + 1 = 10x² - 2
6x² - 10x² + 15 + 1 + 2= 0
- 4x² + 18 = 0 .(-1)
4x² - 18 = 0 ÷ (2)
2x² - 9 = 0
2x² = 9
x = ± √9
√2
x = ± 3 × √2 = 3√2 = 3√2
√2 √2 √4 2
S[- 3√2/2 , + 3√2/2]
x² -2x = 1 -2x
x² -2x +2x=1
x²=1
x=+ou -1
b) 2x² + 5 + 1/6 = 5x² -1 mmc=6
2 3
3(2x² + 5) + 1 = 2 (5x² -1)
6x² + 15 +1 = 10x² -2
6x² -10x²= -1 -2 -15
-4x²=-18 (-1)
4x²= 18
x²= 18/4
x=√18/4simplificando √9/2
x= √9/2 = √9/√2
√9 = 3 .√2 = 3.√2
√2 √2 . √2 2
+ ou - 3√2
2