Предмет: Алгебра, автор: helghast18225

ДАЮ 44 БАЛЛА ! Помогите решить систему уравнений x^2-y=3
x+y=3

Ответы

Автор ответа: sedinalana

0

{x²-y=3
{x+y=3
прибавим
x²+x=6
x²+x-6=0
x1+x2=-1 U x1*x2=-6
x1=-3⇒-3+y=3⇒y=6
x2=2⇒2+y=3⇒y=1
(-3;6);(2;1)

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: nurzhamalkadirbekova

Даю 30 баллов! Срочнооо
210.Choose the correct variant: They’ve bought _______ little house in the south of Spain.
A) A
B) An
C) Some
D) Any
E) The

211. Choose the correct variant: When I saw them they were walking _______ the park.
A) In
B) On
C) Away
D) Off
E) By

212. Choose the correct variant:_____ a swim in the sea.
A) Have
B) Go
C) Get
D) Be
E) Come

213. Choose the correct variant: ______ a train to Paris
A) Go
B) Have
C) Get
D) Be
E) Come

214. Choose the correct variant: ____ up late at the weekend.
A) Get
B) Have
C) Go
D) Be
E) Come

215. Choose the correct variant: She ________ the radio and listened to the news.
A) Turned off
B) Looked for
C) Watched
D) Turned on
E) Took off

216. Choose the correct variant: ___ dressed in the morning
A) Go
B) Have
C) Get
D) Be
E) Come

217. Choose the correct variant: ____ on holiday to Greece
A) Go
B) Have
C) Get
D) Be
E) See

218. Choose the correct variant: ____ for a walk in the evening
A) Have
B) Go
C) Get
D) Be
E) See

219. Choose the correct variant: We love summer. We go on holiday ____ August.
A) In
B) On
C) For
D) At
E) By

220. Choose the correct variant: Our garden is small. There aren’t ____ .flowers.
A) Some
B) Any
C) Much
D) Little
E) An

221. Choose the correct variant: They are quite healthy. They don’t eat ____ sugar.
A) Much
B) Many
C) Little
D) A few
E) Few

222. Choose the correct variant: Listen! Can you _______ that noise?
A) Look
B) Have
C) Hear
D) See
E) Go

223. Choose the correct variants: I’ve met her before but I’ve _______ her name.
A) Lost
B) Remembered
C) Forgotten
D) Written
E) Received

224. Choose the correct variant: Dan has gone out. He _______ about half an hour ago.
A) Leaved
B) Has left
C) Leaving
D) Left
E) Have left

225. Choose the correct variant: The weather was lovely this morning so we _______ to work.
A) Walked
B) Have walked
C) Has walked
D) Are walking
E) Walks

226. Choose the correct variant: Where _______ your sister _______ at the moment?
A) Has working
B) Is / works
C) Has worked
D) Is / working
E) Did / work

227. Choose the correct variant: _______ you _______ well last night?
A) Did / sleep
B) Have / slept
C) Did / slept
D) Do / sleep
E) Are /sleeping

228. Choose the correct variant: She answers the phone and talks to visitors. She is a _______ .
A) Musician
B) Builder
C) Receptionist
D) Nurse
E) Cook

229. Choose the correct variant with one word: He drove the car into the ________.
A) Garage
B) Kitchen
C) Bathroom
D) Bedroom
E) Hall

6 лет назад

Предмет: Алгебра, автор: деву4ка

Решите пожалуйста алгебра 8 класс
$\frac{ {x}^{2} - 4x + 3 }{x + 7} \leqslant 0$

6 лет назад

Предмет: Химия, автор: sofiakagirova6

Установите соответствие между описанием модели и её обозначением: для каждой позиции из первого столбца выберите соответствующую позицию из второго столбца, обозначенную цифрой.

ОПИСАНИЕ
А) 3 атома кислорода
Б) 3 молекулы озона
В) молекула озона

ОБОЗНАЧЕНИЕ
1) 3О3
2) 3О
3) 3О2
4) О3

6 лет назад

Предмет: Информатика, автор: Киви55

Определите, что будет напечатано в результате выполнения следующей программы:
program a7;
var
i, s, sr:integer;
const a: array [1..6] of integer=(1, 7, 3,6,0,10);
begin
s:=0;
for i:=1 to 6 do s:=s+a[i];
sr:=s/6;
writeln(‘sr=’, sr);
end.

9 лет назад

Предмет: История, автор: 99Алексей99

эссе. плюсы и минусы петровских реформ.

9 лет назад