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Mng giải thích hai bài này giúp mình với ạ ,mình đang cần gấp lắm ,cảm ơn ạ I.91. People generally think of tennis as a safe sport. considered@ Tennis is generally considered to be a safe sport. 92. It is advisable not to climb mountains after a heavy snowfall. avoid@ You should avoid climbing mountains after a heavy snowfall.93. Sarah cried her eyes out immediately she was told she failed the exam. tears@ Sarah broke down in tears as she had failed the exam.94. Delia will no longer tolerate her...
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JinniemeYG
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YangSu
28 tháng 6 2023 lúc 14:48

\(a,A=0,2\left(5x-1\right)-\dfrac{1}{2}\left(\dfrac{2}{3}x+4\right)+\dfrac{2}{3}\left(3-x\right)\)

\(=x-0,2-\dfrac{1}{3}x-2+2-\dfrac{2}{3}x\)

\(=\left(-0,2-2+2\right)+\left(x-\dfrac{1}{3}x-\dfrac{2}{3}x\right)\)

\(=-0,2\)

\(b,B=\left(x-2y\right)\left(x^2+2xy+4y^2\right)-\left(x^3-8y^3+10\right)\)

\(=x^3-8y^3-x^3+8y^3-10\)

\(=-10\)

\(c,C=4\left(x+1\right)^2+\left(2x-1\right)^2-8\left(x-1\right)\left(x+1\right)-4x\)

\(=4\left(x^2+2x+1\right)+\left(4x^2-4x+1\right)-8\left(x^2-1\right)-4x\)

\(=4x^2+8x+4+4x^2-4x+1-8x^2+8-4x\)

\(=13\)

 

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HT.Phong (9A5)
28 tháng 6 2023 lúc 14:49

a) \(A=0,2\left(5x-1\right)-\dfrac{1}{2}\left(\dfrac{2}{3}x+4\right)+\dfrac{2}{3}\left(3-x\right)\)

\(A=x-\dfrac{1}{5}-\dfrac{1}{3}x-2+2-\dfrac{2}{3}x\)

\(A=\left(x-\dfrac{1}{3}x-\dfrac{2}{3}x\right)-\left(\dfrac{1}{5}+2-2\right)\)

\(A=-\dfrac{1}{5}\)

Vậy: ...

b) \(B=\left(x-2y\right)\left(x^2+2xy+4y^2\right)-\left(x^3-8y^3+10\right)\)

\(B=\left[x^3-\left(2y\right)^3\right]-\left[x^3-\left(2y\right)^3\right]-10\)

\(B=-10\)

Vậy: ...

c) \(4\left(x+1\right)^2+\left(2x-1\right)^2-8\left(x+1\right)\left(x-1\right)-4x\)

\(=4\left(x^2+2x+4\right)+\left(4x^2-4x+1\right)-8\left(x^2-1\right)-4x\)

\(=4x^2+8x+4+4x^2-4x+1-8x^2+8-4x\)

\(=\left(4x^2+4x^2-8x^2\right)+\left(8x-4x-4x\right)+\left(4+1+8\right)\)

\(=13\)

Vậy:...

Bình luận (2)
dương thái 2k9
28 tháng 6 2023 lúc 14:52

=x−0,2−13x−2+2−23x=�−0,2−13�−2+2−23�

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Kenny
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Đỗ Thanh Hải
5 tháng 12 2021 lúc 20:20

6. Football is considered to be the world’s most popular sport. (is)

It is considered ………that football is…………………………………………… the world’s most popular sport.

7. People said that Roland inherited a lot of money. (was)

Roland ………was said to have………………………………..……………….. inherited a lot of money.

8. It is supposed that too much chocolate is bad for you. (supposed)

Too much chocolate …is supposed to be…………………………………………………………… bad for you.

9. We expect that the government will lose the election. (to)

The government ……is expected to ………………………………….……………… lose the election.

10. Most of the committee think that it is not a viable solution. (not)

It ………isn't thought that it is.................................................................a viable solution by most of the committee.

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hà minh
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Tiên Tiên
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Linh Linh
Xem chi tiết
Đỗ Thanh Hải
9 tháng 6 2021 lúc 22:20

1 for

2 at

3 of

4 for

5 in

6 for

7 at

8 from

9 about

10 against

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Linh Linh
9 tháng 6 2021 lúc 22:19

mk sửa lại nha:

1. He sent a copy of his will to his bank _______ safe keeping.

2. Although I practise quite a lot, I never seem to win very often _______ tennis.

3. Nam's brothers are very fond _______ team sports.

4. Most people think the government is to blame _______ rising unemployment.

5. There has been a sharp increase _______ house prices in recent months.

6. Do you know of a cure _______ baldness?

7. Could you come back in half an hour? Mr. Baston’s -_______ lunch at the moment.

8. I know _______ experience that I do my best work early in the morning.

9. She intended to post my letter, but she forgot all -_______ it.

10. After the war, several people were tried for crimes _______ humanity.

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Selena Alana
1 tháng 5 2022 lúc 16:27

1. for

2. at

3. of

4.for

5. in

6. for

7/ at

8. from

 

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Trần Minh Tuấn
Dương Minh
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Nguyen Hoang Hai
15 tháng 6 2018 lúc 6:10

Đáp án: D

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Dương Minh
Xem chi tiết
Nguyen Hoang Hai
8 tháng 6 2019 lúc 4:43

Đáp án: D

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Dương Minh
Xem chi tiết
Nguyen Hoang Hai
6 tháng 10 2018 lúc 13:19

Đáp án: A

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