Предмет: Математика, автор: Lerqa

(4х-1)(4х+1)+(1+3х)²-2х(8х+5)
Решите , пожалуйста

Ответы

Автор ответа: vladlogvin97
0
16x^2-1+1+6x+9x^2-16x^2-10x=9x^2-4x=x(9x-4)
Автор ответа: KateMace
0
(4х)^2-1+1+6х+9х^2-16х^2-10х= 9х^2-4х=х(9х-4)
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Ребят помогите прошу, я в английском не шарю совсем.
1. Match the world in Column A to the world in Column B.
A B
1. Cartoon A. Park
2. Roller B. Character
3. Water C. Coaster
4. Driving D. License
5. Theme E. Artists
6. Trapeze F. Ride

2. Change the verbs in brackets into the present perfect.
A) Carlos (buy)....................a dog.
B) Maria and Helen (start) ...............at a new school.
C) Frances (break)...............her cup.
D) I (lose)................my umbrella.
E) Max (take)...................the dog for a walk.

3. Use the words to make up sentences in the Present Perfect Tense.
1. Tom /do/his/ homework
2. I/eat/a lot of/ candy floss
3. He/shake hands/with/ Mickey Mouse
4. They/read/this/ book

4. Put the words in the correct order to make up sentences.
1. You /played/ just/have/ hockey?
2. Hasn't/she/yet/painted/house/ her.
3. Have/i/to/camp/computer/a/been/ before.
4. Never/i/seen/giraffe/have/ a.

5. Complete the sentences with gone or been.
1) Dad has....to the office. He'll be back later this afternoon
2) My brother has......to Italy twice.
3) They have never.......to Australia before.
4) Mr Brown looks exhausted. He has........to the post office and back three times today.
5) Tina and Fay have..........to Kent for the day.

6. Put in the verbs in brackets into the gaps. Use Present Perfect
1. I______my rat. (just/to feed)
2. My friend______the Maths test. (to pass)
3. The students______a fight to London. (to book)
4. The baby hedgehogs______the water. You need to get more. (already/to drink)
5. We______the worksheets. (already/to download)
6. The teacher_____the keys, so he can't open the door. (to lose)
7. The cats_____a mouse. (just/to catch)
8. Molly and Kate_____their friends. (already/to invite)
9. Lacy______this portrait. (just/to draw)
10. Sarah_____a table with two columns. (just/to make)