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you should learn the irregular verbs....by....heart

mrs.Hien's daughter should work harder.....on....her English spelling

Some learners make a list and put.....into......it the meaning.....of....new words....in....their mother tongue

please turn..on....the lights for me.It's getting dark.

1.You should learn the irregular verbs by heart.

2.Please wait for us outside the school gate.

3.Mrs.Hien's daughter should work harder on her English spelling.

4.Many thanks for your letter. I'm please to hear from you.

5.Please turn on the lights for me.It's getting dark.

6.It's a bit far from my house to school.

7.My friends sometimes laugh at my jokes.

8.Our new teacher is slim with long black hair.

9.I used to live on a farm and look after my younger brother.

10.You must put all dangerous objects out of children's reach.

Bạn tự xem câu trả lời của mình (giống bài của bạn nhưng khác số) và tự thay vào tính nhé :)

Link : Câu hỏi của Dương Phan Khánh Chi - Vật lý lớp 8 | Học trực tuyến

\(A=\sqrt{2-\sqrt{3}}+\sqrt{2+\sqrt{3}}\\ A=\frac{\sqrt{2}\left(\sqrt{2-\sqrt{3}}+\sqrt{2+\sqrt{3}}\right)}{\sqrt{2}}\\ A=\frac{\sqrt{4-2\sqrt{3}}+\sqrt{4+2\sqrt{3}}}{\sqrt{2}}\\ A=\frac{\sqrt{\left(\sqrt{3}-1\right)^2}+\sqrt{\left(\sqrt{3}+1\right)^2}}{\sqrt{2}}\\ A=\frac{\sqrt{3}-1+\sqrt{3}+1}{\sqrt{2}}\\ A=\frac{2\sqrt{3}}{\sqrt{2}}\\ A=\sqrt{6}\)

\(A=\sqrt{2-\sqrt{3}}+\sqrt{2+\sqrt{3}}\)

\(A^2=\left(\sqrt{2-\sqrt{3}}+\sqrt{2+\sqrt{3}}\right)^2\)

\(A^2=2-\sqrt{3}+2+\sqrt{3}+2\sqrt{\left(2-\sqrt{3}\right)\left(2+\sqrt{3}\right)}\)

\(A^2=4+2\sqrt{4-3}\)

\(A^2=6\)

Vì \(A>0\)\(\Rightarrow A=\sqrt{6}\)

1. The dentist said Mary needed two...fillment.........(fill)

2. She....took......some medicine and felt better. (take)

3. The waiting room was full of patients when we.....arrived.... (arrive)

1.filling

2.took

3.arrived

enjoy+ V-ing

admit+ V-ing

delay+ V-ing

resist+ V-ing

deny+ V-ing

fancy+ V-ing

delay+ V-ing

risk+ V-ing

practice+ V-ing

consider+ V-ing

agree, arrange, ask, decide, hope, learn, manage, offer, plan, prepare, promise, prove, refuse, seem, tend, threaten, expect, want, …

1. The dentist is kind and very helpful ( help)
2. The mother felt worried when her daughter came home late at night.(worry)
3. Don't touch my hand. It's very painful (pain)
4. When I was young, I was scary when I visited the dentist(scare)
5. I have an appointment with the doctor this afternoon.(appoint)
6. Try to wait a few minutes and your tooth stops hurting (hurt)
7. In order to keep the dentist away, we should never touch unhealthy food.(health)

Bạn kia sai 1 ít nên mình làm lại nha

1. The dentist is kind and very ...helpful... ( help)
2. The mother felt ...worried.. when her daughter came home late at night.(worry)
3. Don't touch my hand. It's very ...painful.... (pain)
4. When I was young, I was.... scared........ when I visited the dentist(scare)
5. I have an .......appointment...... with the doctor this afternoon.(appoint)
6. Try to wait a few minutes and your tooth stops .......hurting...... (hurt)
7. In order to keep the dentist away, we should never touch .......unhealthy...... food.(health)

\(1.\)

\(x+6\sqrt{x}+8\\ =\sqrt{x}^2+2\sqrt{x}.3+9-1\\ =\left(\sqrt{x}+3\right)^2-1\\ =\left(\sqrt{x}+2\right)\left(\sqrt{x}+4\right)\)

\(2.\)

\(x-2\sqrt{x}-3\\ =\sqrt{x}^2-2\sqrt{x}+1-4\\ =\left(\sqrt{x}-1\right)^2-2^2\\ =\left(\sqrt{x}-3\right)\left(\sqrt{x}+1\right)\)

\(4.\)

\(x^2-2\sqrt{2}x+2\\ =\left(x-\sqrt{2}\right)^2\)

\(5.\)

\(x^2+2\sqrt{13}x+13=\left(x+\sqrt{13}\right)^2\)

Gọi 2k + 1 là công thức tổng quát của số lẻ

Ta có: (2k + 1)² = 4k² + 4k + 1 = 4k(k + 1) + 1

4k(k + 1) chia hết cho 4

=> 4k(k + 1) + 1 chia 4 dư 1

=> Đpcm

Một số lẻ có dạng \(2k+1\)

Xét \(\left(2k+1\right)^2=4k^2+4k+1=4k\left(k+1\right)+1\)

Vì \(4k\left(k+1\right)⋮4\)\(\Rightarrow4k\left(k+1\right)\)chia \(4\)dư \(1\)

Vậy \(\left(2k+1\right)^2\)chia \(4\)dư \(1\)

Ta có đpcm