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KV
31 tháng 8 2023
Câu 1:
-2x²y + xy + 1 = -2x²y + (xy + 1)
Vậy -2x²y + xy + 1 được viết thành tổng của hai đa thức: -2x²y và xy + 1
Câu 2:
x²y² + 2xy - 3 = x²y² + (2xy - 3)
Vậy x²y² + 2xy - 3 được viết thành tổng của hai đa thức: x²y² và 2xy - 3
Câu 3:
-2x²y + xy + 1 = (xy + 1) - 2x²y
Vậy -2x²y + xy + 1 được viết thành hiệu của hai đa thức: xy + 1 và 2x²y
Câu 4:
x²y² - 2xy + 3 = (x²y² + 3) - 2xy
Vậy x²y² - 2xy + 3 được viết thành hiệu của hai đa thức: x²y² + 3 và 2xy
KM
30 tháng 8 2018
1 : 2/5 , 15/50 , 10/500 , 12/25 , 75/5000 .
2 : 2/5 = 4/10
15/50 = 30/100
10/500 = 20/1000
12/25 = 48/100
75/5000 = 15/1000
# MisyGirl #
27 tháng 2 2023
A. Gọi 5/12 = A/12 + B/12
Mà 5 = 1+4 => 5/12 = 1/12 + 4/12
=> 5/12 = 1/12 + 1/3
B. 8/9 = 8x6/9x6 => 8/9 = 48/54
48/54 = 3/54 +18/54 + 27/54
=> 48/54= 1/18 + 1/3 + 1/2
Vì vậy 8/9 = 1/18 + 1/3 + 1/2
AT
28 tháng 5 2021
Chắc bạn này hẳn bây giờ học đang học lớp 8 , 9 rồi ;)
1. 3/5 = 0.6 = 0,4 + 0,2 ( 2/5 + 1/5 )
= 0,3 + 0,3 ( 3/10 + 3/10 )
= 0,15 + 0,45 ( 3/20 + 9/20 )
2. 1/2 = 0,5 = 0.26 + 0,24 ( 13/50 + 6/25 )
= 0,188 + 0,312 ( 47/250 + 39/125 )
#chucbanhoktot
FT
8 tháng 11 2016
1) I love Hanoi, although I just came to Hanoi for only one time. However, that time was my best time ever.
I came to Hanoi on an autumn day, and my first feeling was the feeling of a peaceful space, not like in Ho Chi Minh City. That feeling was overwhelming all my soul when I was walking along Nguyen Du Street and enjoying the Milk flower. Why was it so beautiful here? In the early winter night, in slightly cold spread hoarfrost, sitting on the bank of Thien Quang Lake, whether at the other side, I still smelt its perfume. I walked along the street and dropped myself in a sweet smell of Milk flower, the wind blew my hair, and I felt so great.
Milk flower on the streets of Hanoi goes deeply inside the memories of Hanoi people and all visistors who have come to Hanoi. It also goes into the music, the poetry, movies. Those are some good ways to introduce Milk flower to everybody. For me, means of communication such as internet or TV are the best ways to introduce Milk flower for all over the world. It is simple when everyone looks at all wonderful pictures or images of Milk flower, they will want to come and enjoy it. In Japan, they have cherry blossom, in Netherlands, they have tulip…How can we know about it? That is all thanks to means of communication. We must let them know that in Hanoi, we have Milk flower. Therefore, the things we need to do now are we should have a website about Milk Flower with pictures, clips, songs, poetry in many languages (if we can)… or we can hold more activities which relate to Milk flower. We must have some more activities to advertise this kind of flower. That was what I think when I saw Milk flower for the first time.
I love Hanoi; I love the early cold winter nights with Milk flower’s smell. I hope Milk flowers will be grown more on Hanoi streets. Milk flower is a precious gift that nature gives to us, especially to Hanoi, our beloved capita.
2)Ho Chi Minh City is the largest city and the region’s centre for economics, education and culture in Vietnam.
First, it is located in the south-eastern region of Vietnam with a tropical climate, specifically a tropical wet and dry climate. The city's location on the Saigon River makes it a bustling commercial and passenger port, besides a constant stream of cargo ships, passenger boats operate regularly between Ho Chi Minh City and various destinations in Southern Vietnam.
Second, Ho Chi Minh City is a large industrial center with more than 600 state enterprises, 20.000 private producing establishment, not to mention the businesses with foreign invested capitals, with numerous forms of production and diversified occupations. So it has high population density with many people from many areas in Vietnam comes and works together.
Next, Ho Chi Minh City has emerged as Viet Nam's main commercial hub and an important motor of economic growth both regionally and nationally. This city has a diversified network of shopping centre, super market, market-day,... Specially, the weekend fairs in HCM City are not only shopping places for young people, but also a destination for sightseeing and shopping for many foreign tourists where people not only can buy supplies but also can buy souvenirs.
Wish you good dental school.
OY
5 tháng 8 2021
1.a) 36=62
64=82
169=132
225=152
361=192
10000=1002
b) 8=23
27=33
125=53
216=63
343=73
8000=203
5 tháng 8 2021
a) \(36=6^2\)
\(64=8^2\)
\(169=13^2\)
\(225=15^2\)
\(361=19^2\)
\(10000=100^2\)
b) \(8=2^3\)
\(27=3^3\)
\(125=5^3\)
\(216=6^3\)
\(343=7^3\)
\(8000=20^3\)
TD
0
\(x^4-1=\left(x^2+1\right)\left(x^2-1\right)=\left(x^2+1\right)\left(x+1\right)\left(x-1\right)\)
Bài làm :
\(x^4-1=\left(x^2+1\right)\left(x+1\right)\left(x-1\right)\)