Home
О нас
Products
Services
Регистрация
Войти
Поиск
Babula
@Babula
June 2022
2
8
Report
РЕШИТЕ УРАВНЕНИЕ
a)x^2-15x+56=0
б)x^2+20x+21=0
в)x^2+x-72=0
г)x^2-3x-18=0
Please enter comments
Please enter your name.
Please enter the correct email address.
Agree to
terms of service
You must agree before submitting.
Send
Answers & Comments
shuraponomarev
А) д=225-224=1
Х1=15+1/2=8
Х2=15-1/2=7
В)д=1+288=289=17
Х1=17-1/2=8
Х2=-1-17/2=-9
Г)д=9+72=81=9
Х1=3+9/2=6
Х2=3-9/2=-3
10 votes
Thanks 14
shuraponomarev
дискриминант
Babula
какой еще дискриминат
Babula
д=225-224=1
mashalisaeva
А) x^2-15x+56=0
D=225-4*1*56=225-224=1
x1=15-1/2=7
x2=15+1/2=8
б) x^2+20x+21=0
D=400-4*1*21=400-84=316
x1=-20-17,7/2=-18,85
x2=-20+17,7/2=-1,15
в) x^2+x-72=0
D=1-4*1*(-72)=1+288=289
x1=-1-17/2=-9
x2=-1+17/2=8
г) x^2-3x-18=0
D=9-4*1*(-18)=9+72=81
x1=3-9/2=-3
x2=3+9/2=6
6 votes
Thanks 13
×
Report "РЕШИТЕ УРАВНЕНИЕa)x^2-15x+56=0 б)x^2+20x+21=0в)x^2+x-72=0г)x^2-3x-18=0..."
Your name
Email
Reason
-Select Reason-
Pornographic
Defamatory
Illegal/Unlawful
Spam
Other Terms Of Service Violation
File a copyright complaint
Description
Helpful Links
О нас
Политика конфиденциальности
Правила и условия
Copyright
Контакты
Helpful Social
Get monthly updates
Submit
Copyright © 2025 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Х1=15+1/2=8
Х2=15-1/2=7
В)д=1+288=289=17
Х1=17-1/2=8
Х2=-1-17/2=-9
Г)д=9+72=81=9
Х1=3+9/2=6
Х2=3-9/2=-3
D=225-4*1*56=225-224=1
x1=15-1/2=7
x2=15+1/2=8
б) x^2+20x+21=0
D=400-4*1*21=400-84=316
x1=-20-17,7/2=-18,85
x2=-20+17,7/2=-1,15
в) x^2+x-72=0
D=1-4*1*(-72)=1+288=289
x1=-1-17/2=-9
x2=-1+17/2=8
г) x^2-3x-18=0
D=9-4*1*(-18)=9+72=81
x1=3-9/2=-3
x2=3+9/2=6