Decomposition factor: X3 + 9 + 3x2 + 3x

Decomposition factor: X3 + 9 + 3x2 + 3x

x3+9+3x2+3x=x3+3x2+3x+9=x2（x+3）+3（x+3）=（x+3）（x2+3）．

The third power of X + the second power of 3x + the common factorization of 59
It should be wrong. The third power of X + the second power of 3x + 50

x^3+3x^2+50
=x^3+5x^2-2x^2+50
=x^2(x+5)-2(x+5)(x-5)
=(x+5)(x^2-2x+10)

It is 44.37 ° in degrees, minutes and seconds=_____ Degree____ Points____ Seconds, in degrees, 9 degrees, 36 minutes, 48 seconds = () degrees

44.37°
=44°22.2'
=44°22'12''
9 degrees, 36 minutes, 48 seconds
=9°36.8'
≈9.613°

A 40 cm long, 30 cm high cuboid glass jar (measured from the inside) has a water depth of 18 cm. First, submerge an iron ball completely in the water, and the water surface rises to 25 cm to calculate the volume of the iron ball

The volume of the rising water surface is the volume of the ball
Then 40 * 30 * 25-40 * 30 * 18 = 8400 (CC)

In the equal ratio sequence, we know that S3 = 4, S6 = 36, and we can find an

1 formula: S3 = [A1 (1-q3)] / (1-Q) = 4
2 Formula: S6 = [A1 (1-q6)] / (1-Q) = 36
Then Formula 1: Formula 2,
1/（1+q3）=1/9
q=2
a1=4/7
an=a1*q（n-1）
=(do it yourself)

The Academy of Agricultural Sciences has a rectangular experimental field. If the length increases by 8 meters or the width increases by 5 meters, the area will increase by 80 square meters. What is the area of the original experimental field? (draw first, then calculate)

As shown in the figure: the original width: 80 △ 8 = 10 (meters), the original length: 80 △ 5 = 16 (meters), the original area: 16 × 10 = 160 (square meters); answer: the area of this experimental field is 160 square meters

How to use punctuation?

There is another form of full stop, that is, a dot. It is usually used in scientific and technological literature

Ten excellent compositions about 1000 words

Grandma's bike
When I was a child, it seemed that before I moved, my parents were too busy to take care of me. Therefore, the task of taking me from kindergarten to school fell on my grandmother. My grandmother was a silent person and never expressed love. However, her little details, like a stream, intertwined and moistened my heart
The deepest memory is Grandma's heavy old bicycle. Today, it has been rusty. The chain of the bicycle has been tortured by years. The rusty frame seems to be talking about the rapid passage of time. However, 10 years ago, it was so brand-new that it carried me and grandma to spend that happy and short childhood together
In spring, everything revives. The blooming flowers and the green grass touch my curiosity. Whenever I hear the sound of "gadagada", I will know that my grandmother is riding her bicycle! So, beside the flowers on the road, I often see the figure of young and old people riding bicycles. Often, my grandmother will stop suddenly and hold my tender hand with her rough big hand, Go to the flowers, and then pick a flower that I think is the most beautiful, put it on my head, and praise me for my beauty. I will be happy to think that I am the most beautiful girl in the world, but I don't know that I am just an ugly duckling. However, that flower brings me unlimited confidence
In summer, the sun is roasting the earth viciously. The earth is like a hot stove, which makes people sweat. At this time, my grandmother will buy me a salt water popsicle with one yuan to satisfy my little wish. Although salt water popsicle is nothing compared with different tastes of cold drinks now, when I was holding a popsicle in my hand, I saw the envy of others, My heart is so proud - I'm proud to have such a grandmother. I always lick the salt water popsicle while listening to the familiar and friendly "gadagada" sound of grandma's bicycle. The hot and dry summer is no longer there
Autumn is also a cold season. At that time, I was weak and sick, and I had to cough every autumn. So, there was a plush cushion on the back seat of grandma's bicycle, and the warm current ran through my whole body, Warm my heart. I don't know why, since then every autumn I will never catch a cold, the body has been much stronger than before
In winter, the northwest wind is like a sharp knife. My hands often become very dry and crack. At this time, my grandmother will wrap my cold little hands with her warm hands. Even on the bicycle, my grandmother never forgets to tell me to put my hands in grandma's pocket to keep warm, Really, it's warmer than a hot water bag
In this way, grandma's bicycle has carried me through countless years. Now, the bicycle is worn out, grandma is old, and I have grown up. However, grandma's bicycle is always brand new in my heart, just like it was 10 years ago
I'm a wild goose that doesn't stray
Once, I was silent, I feel inferior, I am dejected, but no one knows that I am silent, I feel inferior, I am dejected
Once upon a time, the collective is just a synonym for many people, just waiting for the rite of passage together. School, entertainment and life are all separated from the group. I am like a child who can't hold a kite, like giving up, like lost, and like frustrated. For a long time, I have been looking for the missing things. For a long time, the sudden cohesion is like a huge charm to me, This cohesion encourages me when I am lost, calms me when I am angry, supports me when I am vulnerable, and gives me courage when I am afraid
Senior one, recitation competition, I and a group of students by one vote to win the class competition, but this victory can not inspire me, because I always feel that everyone's vote is mainly focused on another student, and, I am not confident. Later, the class competition, lost. Even the cause of the failure do not want to reflect, only remember that it is a failure
Senior two, recitation competition, I finally decided to fight alone, when I stood in front of the students with confidence, but I was distorted by the disturbing psychology of recitation. After reading a piece of paper, I came back to my seat with a little embarrassed smile and secretly blamed myself
My deskmate said, I'm very good. In fact, this sentence is enough, at least my small inferiority feeling has been comforted. Once I heard a sentence, as long as I stand on the stage, even if only one person is willing to watch my performance, I will continue. Maybe, I'm not so great, because I'm worried about gain and loss, and I want to get the support of most people. But such determination is also very moving, Sometimes a little support is good for me
Later, I was elected as the class representative with the highest number of votes to participate in the next preliminary contest. Then I understood that perhaps the meaning of going further and further in life lies in the experience and understanding. I understood failure and strength, frustration and optimism, loss and treasure
In the past, I didn't deeply lick the meaning of the collective. Because in my world, there is no need to be noisy and cohesive. Later, I felt the strength of unity and the moving of cohesion, and cherished the time together with each other more. However, when time like a slowly rotating windmill glided through the gears of years, I realized that I had never used the drill pipe of the collective to dig a deep hole, Used to store the power once gained
At that time, I felt panic and uneasiness when everything around me was changing with time. The ice walls and faces on all sides were so strange and indifferent. However, how could I greet my new world with a good attitude? When hesitation and uneasiness like red ants gnawed at my pride and self-confidence, I comforted myself again and again: I would get used to it
One day, one week, one month later, I think that if I were given another year, I would not be able to adapt to the present, let alone go back to the past. The environment has changed, and escape, fear, and cowardice are not my destination. Then, let me stand on the high stage of self-confidence and proclaim that I am not inferior or arrogant post-90s! All the strangeness, silence, jubilation, and thunder only happen on and off the stage, When I am only a little away from everyone, I will feel how appropriate and shocking the power of people is to me
At that moment, I really hope to let it last forever. At that moment, I seem to find myself again, as if I have enriched my confidence in the new future. In other people's eyes, it is the courage given me by the stage. In fact, it is the courage given me by all the people under the stage - the collective that is inseparable from me. Although no one knows that my heart beats fast, although every heavy step of me is silent, But I'm still as magnificent as a mountain and a river
When I decided to rely on my own strength to stand on the stage around the aura of confidence, I realized how important each member of the collective is to me, Every member is a shining star, a powerful force and a reliable mountain. My every effort needs to be supported, encouraged and affirmed
Suddenly found that I can not do without the collective, can not do without dawn. Birds, South or North, east or west, with a companion to follow, have a broader blue sky, can be more unrestrained to fly. And I just want to be a companion with the shade, galloping life of the birds, with not leaving the crowd
Growing up in frustration
Stumble, light wipe the memory of life
——Inscription
Bit by bit in the memory of life, bumpy ordeal, are the witness of life
Warm life, there will be some unforgettable, so some memories, so some sad fragments. Perhaps also shows that life, not perfect, there will always be some defects
The beginning of life is really beautiful. The process of life is even more beautiful!
In the golden childhood, there are endless happiness; in the gorgeous youth, there are endless topics to talk about; in the confused future, there are endless landscapes to hope for
Gorgeous youth, the most beautiful season. Beautiful season also has withered leaves, gorgeous youth is not without setbacks!
In the ignorance of childhood into the season of youth, there are always a lot of yearning, but a gust of wind, a rain, but full of yearning people, back to the starting point
In the song of happiness, there is sadness; in the smile of happiness, there are tears; in the journey of happiness, there is a loss of direction. Is it funny? Since it is happiness, why are there sadness, tears and even loss of direction?
Light wipe that a trace of ridiculous, into the tears of brilliant youth
Across the memory, there are some incredible, there are some unexpected, there is a little puzzling. But saw a lot of dream reality
Learn to taste the sweet moment of life, we should accept the bitterness of life
Learn to accept every failure, rather than escape, so over time, you will find that life is very beautiful, youth life is really beautiful, with its youth life more beautiful
When we set sail, the sun also jumped out of the horizon. We were sailing in the sea, suddenly one day, dark clouds, thunder, spray hit the ship, the wind hit the sail, the whole ship became unstable, there was a sense of fear in my heart, maybe the next second, the sailing boat has been overturned and sunk into the sea