Предмет: Математика, автор: nelle08

Найдите один из корней квадратного уравнения

Приложения:

Ответы

Автор ответа: koshmarrr
0

х²+17х-38=0

D=289+152= 441

x1=-17-√441/2=-8.5-√110.25

x2=-71+√441/2=-8.5+√110.25

Автор ответа: bceznayka78
0

Ответ:

D=17в квадрате -4*1*(-38) =441

x первый=(17+21) :2=38:2=19

x второй =(17-21) :2=-4:2=-2

ответ: x=19;-2

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Put the verbs in brackets into the Present Indefinite or the Present Continuous.

A: Michael is being (to be) very quiet today. Is anything wrong?

B: No, I don’t think so.

A: These towels …………… (to feel) as soft as silk.

B: I’ve just washed them.

A: We …………… (to think) of moving back to England.

B: Really? When?

A: Where’s Andrew? We can’t find him anywhere.

B: It …………… (to look) as if he’s disappeared.

A: What perfume are you wearing? It …………… (to smell) lovely.

B: Thanks. It’s called “Angel”.

A: The Trio Dance Group …………… (to appear) at the Odeon tonight.

B: Shall we go?

A: This skirt …………… (not to fit) me any more.

B: You must have gained some weight.

A: Mum, I saw a ghost last night.

B: Don’t be silly. You …………… (just/ to see) things.

A: What’s Dad doing?

B: He …………… (to taste) the potatoes to see if they are cooked.

A: The Richardsons …………… (to have) a cottage in Cornwall.

B: I know. They bought it a few years ago.

A: I really …………… (not to see) what the problem is.

B: No, I don’t understand it either.

A: This soup …………… (to taste) delicious. How did you make it?

B: Well, it’s really very simple.

A: What’s that noise?

B: It …………… (to sound) like Jane playing her trumpet!

A: Are you busy at the moment?

B: Yes. I …………… (to arrange) a very important meeting.

A: What time …………… (the train/to leave)?

B: At 6 o’clock.