Articles
Register
Sign In
Search
AndrezzaCV
@AndrezzaCV
December 2019
1
8
Report
X ao quadrado -3x-7x+21+10=30
e
x ao quadrado -4=0
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
emicosonia
X ao quadrado-3x-7x+21+10=30
x² - 3x - 7x+ 21 + 10 = 30
x² - 10x + 31 = 30 ( igualar a ZERO) atenção no SINAL
x² - 10x + 31 - 30 = 0
x² - 10x + 1 = 0
a = 1
b = - 10
c = 1
Δ = b² - 4ac
Δ = (-10)² - 4(1)(1)
Δ = + 100 - 4
Δ = + 96
Δ = + 96 fatora 96| 2
48| 2
24| 2
12| 2
6| 2
3| 3
1/
= 2.2.2.2.2.3
= 2².2².2.3
= (2.2)².6
= (4)².6
assim
√Δ = √96 = √(4)².6 ( elimina a √(raiz quadrada) com o (²))
√Δ = √96 = 4√6
se
Δ > 0 ( DUAS raizes diferentes)
(baskara)
- b + -
√Δ
x = ---------------------
2a
- (-10) -4
√6 + 10 - 4√6 10 - 4√6 : 2
x' = ------------------ = ----------------- = ---------------- = 5 - 2
√6
2(1) 2 2 : 2
e
-( -10) + 4
√6 + 10 + 4√6 10 + 4√6: 2
x" = ---------------------- = ------------------- = ----------------- = 5 + 2
√6
2(1) 2 2 : 2
e
x ao quadrado -4=0
x² - 4 = 0
x² = + 4
x = + -
√4 (√4= 2)
x = + - 2
assim
x' = - 2
x" = + 2
1 votes
Thanks 1
More Questions From This User
See All
AndrezzaCV
January 2020 | 0 Respostas
Responda
AndrezzaCV
January 2020 | 0 Respostas
Responda
AndrezzaCV
January 2020 | 0 Respostas
QUAL O VOLUME DE 216 METRO CUBO
Responda
AndrezzaCV
January 2020 | 0 Respostas
Responda
AndrezzaCV
January 2020 | 0 Respostas
When i wake up in the morning .i go to the bathroom to wash myself. them i come back to the bedroom and dress myself. i make my bed myself and prepare my own breakfast. after breakfast.after breakfast. i take my breafcake and drive to work downtown. TRADUZIR
Responda
AndrezzaCV
January 2020 | 0 Respostas
Responda
AndrezzaCV
January 2020 | 0 Respostas
Responda
AndrezzaCV
January 2020 | 0 Respostas
Responda
AndrezzaCV
January 2020 | 0 Respostas
Responda
AndrezzaCV
January 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 "X ao quadrado -3x-7x+21+10=30 e x ao quadrado -4=0.... Pergunta de ideia de AndrezzaCV"
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
x² - 3x - 7x+ 21 + 10 = 30
x² - 10x + 31 = 30 ( igualar a ZERO) atenção no SINAL
x² - 10x + 31 - 30 = 0
x² - 10x + 1 = 0
a = 1
b = - 10
c = 1
Δ = b² - 4ac
Δ = (-10)² - 4(1)(1)
Δ = + 100 - 4
Δ = + 96
Δ = + 96 fatora 96| 2
48| 2
24| 2
12| 2
6| 2
3| 3
1/
= 2.2.2.2.2.3
= 2².2².2.3
= (2.2)².6
= (4)².6
assim
√Δ = √96 = √(4)².6 ( elimina a √(raiz quadrada) com o (²))
√Δ = √96 = 4√6
se
Δ > 0 ( DUAS raizes diferentes)
(baskara)
- b + - √Δ
x = ---------------------
2a
- (-10) -4√6 + 10 - 4√6 10 - 4√6 : 2
x' = ------------------ = ----------------- = ---------------- = 5 - 2√6
2(1) 2 2 : 2
e
-( -10) + 4√6 + 10 + 4√6 10 + 4√6: 2
x" = ---------------------- = ------------------- = ----------------- = 5 + 2√6
2(1) 2 2 : 2
e
x ao quadrado -4=0
x² - 4 = 0
x² = + 4
x = + - √4 (√4= 2)
x = + - 2
assim
x' = - 2
x" = + 2