yes

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BẰNG 60 YẾN

600 tạ = 6000 yến

x(x-1)=0

=>x=0 hoặc x-1=0

=>x=0 hoặc x=1

Vậy x thuộc{0;1}

câu hỏi của bạn bằng 1

a; -(3 - 2\(x\)).(\(x+1\))

= - 3.(\(x+1\)) + 2\(x\).(\(x+1\))

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

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

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

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

b; 2\(x\).(3 - \(x\)) - (\(x+1)^2\)

= 6\(x\) - 2\(x^2\) - (\(x^2\) + 2\(x\) + 1)

= 6\(x\) - 2\(x^2\) - \(x^2\) - 2\(x\) - 1

= (6\(x\) - 2\(x\)) - (2\(x^2\) + \(x^2\)) - 1

= 4\(x\) - 3\(x^2\) - 1

= - 3\(x^2\) + 4\(x\) - 1

c; (\(x+4\))(2 - \(x\)) - (\(x^2\) - 2)

= \(x\).(2 - \(x\)) + 4.(2 - \(x\)) - \(x^2\) + 2

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

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

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

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

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

d; - 2.(\(x-1\)).3\(x\) - 3\(x\).(\(x+2\))

= - 6\(x^2\) + 6\(x\) - 3\(x^2\) - 6\(x\)

= - (6\(x^2\) + 3\(x^2\)) + (6\(x-6x\))

= - 9\(x^2\) + 0

= -9\(x^2\)

`a)x + 37 = 50`

`=> x = 50 -37`

`=> x = 13`

Vậy `x =13`

`b) 2x -3 = 11`

`=> 2x =11 +3`

`=> 2x = 14`

`=> x = 14 :2`

`=> x = 7`

Vậy `x =7`

`c) (6-x) :2 = 5`

`=> 6-x = 5 xx2`

`=> 6-x = 10`

`=> x = 6-10`

`=> x = -4`

Vậy `x =-4`

was

A. was

Cần gấp nha. Giúp mik với

This picture shows three happy children in a living room. A girl with a hat is sitting on a yellow sofa and playing the guitar. On the blue floor, a boy is looking at a paper, maybe a map. Another girl is sitting next to him and looking at a tablet. There are many toys on the floor, like a teddy bear and a basketball, near a big box. The room has two big windows and two lamps, so it is very bright. It looks like the children are having a fun time together at home.

This is a colorful and cozy room where three children are spending time together. In the background, a girl wearing a red hat is sitting on a yellow armchair, happily playing a guitar. She looks cheerful and seems to be enjoying the music. In front of her, a boy and a girl are sitting on the floor. The boy is looking at an open book, pointing to something, while the blonde girl beside him is listening carefully. There is also a tablet placed on the floor in front of them, suggesting they might be learning or reading together.

The room is bright with two large windows letting in sunlight. A lamp and a green plant are placed on a small table beside the armchair. On the left side, there is a box full of toys, including a teddy bear, a toy truck, a robot, and a basketball lying nearby. On the right side, there is a coat stand with a hat hanging on it. Everything in the room looks tidy and well-arranged, creating a comfortable and friendly environment for the kids. The scene shows a beautiful moment of friendship, learning, and fun, reminding us of the joys of childhood and spending time together.

Hình như là con muỗi á bạn

Muỗi Hại đến sức khỏe chủ yếu qua lây bệnh: malaria, sốt vàng, sốt xuất huyết, Zika… Giết khoảng 725.000–1.000.000 người mỗi năm

Con người

Giết lẫn nhau qua homicide: khoảng 400.000–475.000 vụ tử vong mỗi năm .

Rắn

Gây tử vong khoảng 50.000–138.000 người mỗi năm, đặc biệt ở khu vực nông thôn có ít kháng huyết thanh chống nọc độc .

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