mk ko bt nhưng mk bt kq là 50 bn ạ

\(\left(x^2+y^2+1^2-2xy-2x+2y\right)+\left(y^2+4y+2^2\right)+\left(13-1-4\right)=0\\ \)

\(\left(x-y-1\right)^2+\left(y+2\right)^2+8>0\) Bẫy hả Cái đầu không tồn tại sao có cái sau được

câu này không tính dc N ngonhuminh ! can cm nhu bn la dug

Tính vô ghi đề sai sửa lại là rồi làm tiếp mà thôi. Đáp án đúng thôi vậy :3

Ta có : \(4x-\left(2x+1\right)=3-\frac{1}{3}+x\)

(=) \(4x-2x-1=3-\frac{1}{3}+x\)

(=) \(4x-2x-x=3-\frac{1}{3}+1\)

(=) \(x=\frac{11}{3}\)

\(3x^2-2x.\left(5+1,5x\right)+10\)

\(=3x^2-2x.5-2x.1,5x+10\)

\(=3x^2-3x^2-10x+10\)

\(=10-10x\)

\(=10.\left(1-x\right)\)

cam on ban nha

\(x+\frac{1}{4}=\frac{1}{64}\)

\(x=\frac{1}{64}-\frac{1}{4}\)

\(x=-\frac{15}{64}\)

Vậy x = -15/64

hok tốt

==.==

(x+1/4)=1/64

x=1/64-1/4

x=-15/64

Vậy x = ...

x=1/64-1/4

x=-15/64

III .

1. There is a pencil in the box .

2. There is a lamp on the table .

3. There are three pictures in this book .

4. There are some students in the classroom .

5. There are two couches in the room .

6. There are many people in the house .

7. There is a light on the wall .

8. There is a garden behind the house .

9. There are four boxes in the desk .

10. There are three birds in the sky .

V.

1. What's your sister doing ?

- She is doing her homework .

2.Who is it ?

- It's Tom .

3. How many people are there in your family ?

- There are five people in my family .

4. Are there four pictures on the wall ?

- Yes, there are

5. Is there a post office near here ?

- No, there isn't

6. What's your name ?

- My name is Lan .

7. What is there in the box ?

- There's an eraser in the box .

8. Who is Nam's sister?

- Mai is Nam's sister .

9. What are they doing ?

- They are watching TV.

10. What time is it ?

- It's ten ten.

Các từ láy trong truyện Sơn Tinh - Thủy Tinh là :

bàn bạc. tờ mờ, cuồn cuộn, lềnh bềnh. nao núng, ròng rã, cuối cùng, vững vàng, chán chê

( mk ko chắc mấy)

là từ : .......

đừng chấp thám tử thằng đấy nó bẩn tính lắm