Предмет: Алгебра, автор: Ния2017

Решите уравнерие x в квадрате + 5x-14x=0

Ответы

Автор ответа: Liza4444

0

x²+5x-14x=0
D=b²-4ac=5²-4×1×(-14)=25+56=81=9²
X1=(-5+9)÷2×1=2
X2(-5-9)÷2×1=-7

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Математика, автор: osinska27112009

СРОЧНО НУЖНО РЕШИТЬ

5 лет назад

Предмет: История, автор: Аноним

якою цифрою на картосхемі позначено територію східнослов'янського племінного союзу полян

5 лет назад

Предмет: Английский язык, автор: fashdj

ПОЖАЛУЙСТА, ПОМОГИТЕ Выберите правильный вариант ответа.
1
4
5
Where when I saw you yesterday morning?
A you going
B were you go
C were you going
The children a game online when their parents came back.
A were playing
B was playing
C playing
Some players to the coach, but others were playing with a ball.
A listen
B were listening
C was listening
Who was that woman you
- to?
A was talking
B talks
Cwere talking
Why last night?
A was the baby crying B the baby was crying C was crying the baby
While David attention, someone took his tablet.
A didn't pay
B wasn't paying
C not paying
The team scored the goal while at the TV.
A wasn't looking
B not looking
C weren't looking
The footballers after the ball when the referee stopped the match.
A
B were run
C were running
was running
6
7
8

5 лет назад

Предмет: Математика, автор: Аноним

Сколько метров в 1/10км?

9 лет назад

Предмет: Математика, автор: NikaShoping

Два лыжника вышли из двух пунктов и через 2 часа встретились. Скорость одного 12 км/ч другого 8 км/ч. Каково расстояния между пунктами?

9 лет назад