Simplify 4x (2x-2) - (4-3x)

Simplify 4x (2x-2) - (4-3x)

4x（2x-2)-(4-3x)
=8x^2-8x-4+3x
=8x^2-5x-4

There is such a problem: calculate the value of (2x & sup3; - 3x & sup2; y-2xy & sup2;) - (X & sup3; - 2XY & sup2; + Y & sup3;) + (- X & sup3; + 3x & sup2; Y-Y & sup3;), where x = 1 / 2, y = - 1. Classmate a mistakenly copied x = 1 / 2 into x = - 1 / 2, but her calculation result is also correct. Can you tell me why?

(2x & sup3; - 3x & sup2; y-2xy & sup2;) - (X & sup3; - 2XY & sup2; + Y & sup3;) + (- X & sup3; + 3x & sup2; Y-Y & sup3;) = - 2Y & sup3; has nothing to do with the value of X, so taking any value of X will not change the result

If the absolute value of X + 1 is equal to the inverse number of the square of (Y-2), then 2x + y =?

∵|x+1|=-(y-2)²
∴|x+1|+(y-2)²=0
∴x+1=0,y-2=0
∴x=-1,y=2
∴2x+y
=2×(-1)+2
=-2+2
=0

Vertical calculation of double digit multiplied by two digit

When multiplying the two digit vertical formula, divide the result by any one of the two digits
Then we can get the result

The denominator of LIM X-1 is X-1, the numerator is 5x-4 under the root sign, and then subtract x under the root sign

If the numerator denominator is multiplied by √ (5x-4) + X at the same time, it can be transformed into
5x-4-x 4
---------------------=When x tends to 1, its value is 2
(x-1)*(√(5x-4)+√x) √(5x-4)+√x

How to solve 6.5 + 6.5x = 7x

6.5+6.5x=7x
6.5=0.5x
x=13

A barrel of oil weighs 15 kg. After buying half of it, it weighs 8.25 kg. How many kg does the barrel and oil weigh?

15-8.25 = 6.75, 6.75 × 2 = 13.5 is oil weight, 15-13.5 = 1.5 is barrel weight

It is proved that (x Λ 2 + y Λ 2) / 1 + (X-Y) Λ4 limit does not exist

You have to point out where to find the limit. Did you give it?

Logical expression combined with comma expression 1
Find a number in a series of numbers and use the empty body loop of for

char usedStr[20] = ""; gets(usedStr); char statStr = 'o'; statStr = getchar(); int flag = 0; //flag = 1; int index = -1; for (int i = 0; (usedStr[i] != '\0') && ((usedStr[i]!=statStr) || (index=i, fla...

What are the ancient poems about the Three Gorges?

If you want to go down the gorge, please send it first
Bai Juyi
Chaolai got the letter of Dongchuan again. He wanted to get the letter of Zizhou at the beginning of spring
The book newspaper Jiujiang hears the temporary joy, the road passes the Three Gorges to think also worries
Xiaoxiang miasma fog plus meals, pre shock wave stable mooring boat
To send two lines of tears, the Yangtze River refused to flow westward
Seeing off guests to Beijing
Bai Juyi
When will the land and water return to Qin?
The boat leaves the rain of the Three Gorges and the horse enters the dust of the nine thoroughfares
There is wine for the traveler, but no book for the noble
It's a good thing that Qu Jiangchun is the only one with distant language
Entering the gorge for Badong
Bai Juyi
I don't know when Yuanjun will arrive, but I'd like my family to come here
Ten thousand Li Wang Cheng outside the Three Gorges, a hundred years of livelihood in a boat
Wushan dusk foot stained with rain flowers, spring Longshui more adverse wind
Two pieces of red banners and several drums make you go to Padang
Three Gorges smell ape
Guan Xiu
The sound of the ape, a few white smoke
There should be more moon trees than frost
Thousands of miles away, thousands of mountains quietly
I'm still not living, which makes me want to move the boat
Three Gorges smell ape
Mu you
Who to this do not hate life, sound is heartbreak sound
Seven thousand miles away, I live alone in front of twelve peaks
Miasma night Tibetan goddess temple, smoke cold lock Yelang city
With you and listen to the mourning good, will wait for Qingyun Road flat
Upper Three Gorges
Li Bai
Wushan with blue sky, baliuruozi
Ba water can be used up suddenly, but there is no time for the blue sky
It's too late to walk in the evening
Three dynasties and three twilight, don't feel sideburns into silk
Ode to egrets and send song Shaofu to the Three Gorges
Li Bai
Egret boxing a foot, moon bright autumn cold
People fly far away, straight to Shijun beach
Watching Danqiu in Yuan Dynasty and sitting on Wushan screen
Li Bai
In the past, when you visited the Three Gorges, you could see Wushan, and you could see the painting of Wushan, which was similar,
Fly into the color screen of your home. The cold pines are bleak, and the balcony is boundless
It's just like a thousand miles high,
Green screen Danya can like Qi. Cangcangyuan trees around Jingmen, experience boat pan Ba water
Water and stone are flowing in all valleys, smoke and grass are flowing in the atmosphere. When will the flowers of the river smile,
Jiangke heard how old the ape was. It makes people feel nostalgic for this, and suspect that they are in the clouds of songqiu dream
One of the ten quatrains of Kuizhou song
Du Fu
East of China and Pakistan, East Mountain of Pakistan, river water flows in it
Baidi high for the Three Gorges Town, Kuizhou risk over 100 prison pass
Two cliffs in Qutang
Du Fu
Where the Three Gorges pass, double cliff strong this door
Into the sky still stone color, through the water suddenly cloud root
He has a long beard and is respected in Jiaolong cave
Xihe winter Yu near, worry fear day car turn
Sad autumn
Du Fu
The cool wind moves thousands of miles, and the bandits are still rampant
Far away from home, autumn comes as a guest
Sad to see the high bird, old chase people
If you want to invest in the Three Gorges, why do you see the two capitals
From the beginning to Qianwei
CEN Shen
Inside the porch sill of mountain scenery, between the pillow seats of beach sound
The grass grows, the government is quiet, and the flowers fall
The clouds and rain connect the Three Gorges, and the wind and dust connect hundreds of people
Come a few days, don't feel sideburns
I heard that Xiucai fan traveled in the rivers and lakes from Sichuan
Du Mu
Xiangzhu under the Shu Road, passenger sails should not be lost
The river is divided into three gorges, and the mountain is combined with Jiuhua
In autumn, the wild geese are sleeping, and the apes are singing at night
Be careful with your luggage when you return. Don't go to the west of Shicheng
Xian mountain sends Zhang to visit Badong in Africa
Meng Haoran
Xianshan Nanguo outside, see off every landing. Sha'anjiang village near, songmenshan Temple deep
A word to give, the Three Gorges will find. Ancestral seat Yicheng wine, journey yunmenglin
When you are gone, don't drown your mind
Wu Gorge
Yang Jiong
Three Gorges seven hundred miles, only words Wuxia long. Heavy rock, not extreme, overlapping peaks Ling Cang
Cliff horizontal natural danger, rotten brocade chapter berry moss
If I am faithful to what I have done, I will not be hurt by boating
Where is the beauty today? Ganoderma lucidum has fragrance in vain
Send people back to Shu
Zhang Hu
Jincheng spring back to the source of the river, the Three Gorges after a few nights
Mangrove two units open Ji color, blue rock thousand Ren up ripples
The dream of King Jing in the evening, the soul of emperor Shu in the spring
Long resentment, such as lingering place, rich also remember Zhuo Wang sun
Send Wang Chushi to Sichuan
Qi Ji
Then he sailed to Jinchuan and spent his remaining years in a magnolia boat
Self cultivation of colorful things in the furnace, as floating water fairy
The waves of the Three Gorges are noisy, the moon is bright, and Wanzhou mountain is at sunset
In the coming year, there will be letters from Jingnan, which should be sealed
Out of the gorge
Hu Hao
Badong Three Gorges do, Kuang Wang Jiujiang open
Chu clouds out, Jingmen water up
Fish dragons roar in the rain and geese thunder
The autumn wind in the south is late, and the guest's thoughts are quite leisurely
Send friends back to Jingchu
Xu Hun
I know the Jingchu gate well
Bamboo spot sad emperor and daughter, grass green resentment king and grandson
The ebb and flow of the tide, the rain and the Three Gorges
Come and go differently, and you will hurt your soul even more
Wushan high
Chen Tao
Yufeng Qingyun twelve Branches, Jinmu and Yunci Yaoji
The flower palace is outside the Chu palace, with stars hanging on all sides
Beautiful unparalleled resentment of the Three Gorges, a few dreams of spring Xiangwang hunting
Qingluan is not lazy to play flute. Banzhu writes poems to concubine Jiang
Floating silk scattered son days, moss clothes jade bridle red flag
Back when the White Emperor cover qingsuo, qiongzhi grass left Xiangyan
Songs of the Three Gorges
Li Jilan
I live in Wushan cloud, Wushan water often smell
Yuqin pop up to turn a few options, straight like a dream at that time
The Three Gorges spring flows thousands of miles into the boudoir
Boulders rush to the cliff, pointing to the next generation, flying waves and waves
At first, it was suspected that there was a thundering wind, and it seemed that there was no flow
Back to turbulence, qulaisi will be exhausted, when the complex drop in the sand
In the past, Ruan Gong could not listen enough to this song
One shot after another, like Liuquan town
In the gorge
Lian family
In autumn, when the Three Gorges go here, the song birds and apes can't be heard
A sound of water is more than rocks, and the sky is less clear at four o'clock
Day and night boating at the mouth of XuXi River, the night is full of thoughts
2. Words
#NAME?
Cao Guan
Shuchuan Three Gorges, there are high Tang wonders, immortal secluded place
Boulders and crags face water, and waves roar into the sky
Twelve spirit peak, cloud terrace, Wushan woman
Change in a moment, balcony morning and evening clouds and rain
Can laugh Chu Huai Xiang, when the strict father and son, Hu ran boundless
Dream is all fan, should feel every evil spirit, empty words meet
Fairy shame for media, Kuang God straight, how can light framed
Song Yu's Ci Fu is contemptible for the evil of the king
Manjianghong
He Shixin in Song Dynasty
A water flies in the air, uncovering the whole bead curtain
There is no need for people to roll, no need for people to roll
No swallow at all, no fish at all
To the mountain, step by step to listen to the sound, clear as jade
Three Gorges water, can be people. Three Jilang, can be long bath
More natural and unrestrained on both sides, the number of poles Xiuzhu
Dawn Clinique smoke for the rope, night with the crescent for the hook
Who was the title product in those years? Huangshan valley