1-x △ (the square of 1 + X + x) + 6 △ (1-x) = 7 △ (1-x)

1-x △ (the square of 1 + X + x) + 6 △ (1-x) = 7 △ (1-x)

1-x/(1+x+x²)+6/(1-x)=7/(1-x)
1-x/(1+x+x²)=1/(1-x)
Multiply both sides by (1-x) (1 + X + X & #)
1-x³-x(1-x)=1+x+x²
x³+2x=0
x(x²+2)=0
x=0

-2X square + 9x + 5 ≥ 0

-2X square + 9x + 5 ≥ 0 inequality both sides multiply by negative sign, unequal sign reverse
2X square - 9x-5 ≤ 0
(2x+1)(x-5)≤0
So x ≤ - 1 / 2 or X ≥ 5

How much process of finding 2x square - 9x + 14 = 0

From 2x square - 9x + 14 = 0,
a=2,b=-9,c=14；
The discriminant B & # 178; - 4ac = 81-4 × 2 × 14 = - 31 < 0
The equation has no real roots

Write a composition about Wenchuan earthquake
Wenchuan earthquake to write a composition, the number required at least 800 words!

At 14:28:04.0 on May 12, 2008, a 7.8 magnitude earthquake occurred in Wenchuan County, Sichuan Province. According to the latest progress report of earthquake disaster and disaster relief in Sichuan Province, as of 16:00 p.m. on May 13, the disaster situation in Sichuan Province has been as follows: more than 12000 people have died, 26206 people have been injured, 9404 people have been buried and 3.46 million houses have been damaged

The first anniversary of Wenchuan earthquake
To 200 to 300 words or more, do not copy!

12 May 2008
We will always remember this day
Wenchuan earthquake
The house collapsed
The family is gone
The home was in ruins
There were cries of horror everywhere:
Mom and Dad, baby——
Where are you?
A year has passed
Pain is no longer a physical injury
It's a wound in the heart
Tears are not all sorrow
Also moved
We don't cry
We shed too many tears
We've been through a lot of injuries
We don't cry
We got the fastest and best treatment for our injuries
The care of all sectors of society has made us create many miracles
We have food, quilts, new houses
We don't cry - we don't cry——
Your care ignites our hope
Your true feelings make us stronger
We won't forget
Relatives lost in the earthquake
We will always remember
Your great kindness
Great disaster shows great love
Think about that
The PLA is fighting on the front line of life and death rescue,
Volunteers joined the rescue team from all directions
People all over the country and overseas Chinese enthusiastically donated money
Cadres and students rolled up their sleeves and went to the street to donate blood
International organizations are also actively providing financial assistance
……
It is difficult for one side to get support from all sides
All eyes are focused on one place
All the concerns are in one place
——Wenchuan
Come on, China! Come on, Sichuan! Come on, Wenchuan!
The voices of hundreds of millions of people are still in my ears
A year has passed
We have to talk about what we said at that time
don 't panic
Home destroyed, we help you build
We are all your relatives after our relatives leave
Let's shoulder the worst disaster together
We will be your support in the future
don 't panic
Behind you is a strong motherland
There are 1.3 billion brothers and sisters behind you
The disaster brought great difficulties
But you didn't bow
Thank you, the relatives of Wenchuan
It's at the cost of losing your family and home
Let's abandon selfishness
Let our Chinese people be more united
Let the world see the hero's motherland
Heroic country
People with heroes
Teachers who sacrifice their lives to save students
Use your body to protect your child's parents
A wife who resists the collapse of a house beam for her husband
A young mother who protects her baby by lifting weights with both hands and shoulders
A policewoman who is still fighting hard after losing her parents and children
A little girl who suffered a fracture of her left hand and suffered severe pain to salute the soldiers
Just came out of the ruins, knelt on the ground crying for me to save another soldier
……
Every disaster
Always leave a lot of moving
PLA, doctors and nurses, public security police
Where there is need, there is their shadow
Where there is danger, they are always at the front
It's not that they don't want to rest
It's not that they don't cherish their lives
But they are more committed to their sacred duties
Tan Qianqiu, Lian Rong, Jing Lijie, Yuan Wenting, Chen Dagui, Wang Gang, Jiang Min
There are too many hero names
There are also many heroes whose names we don't know
Let's remember these heroes who died or lived
And remember the unsung heroes who died or lived
Any disaster
In front of 1.3 billion Chinese
In front of the great motherland
Will be defused
five point one two
This is a special day
Let's light the candle
And silent standing
Pray for the relatives and heroes who died in the earthquake
I hope they rest well on the other side of the sky
Also for those who survived the earthquake
May they live a happy and sad life
Let's hold hands
Pass love on, let love not grow old

How do I write the composition that I want to say to the children of Wenchuan earthquake
450 words required

From the beginning of the earthquake, the development of the motherland to the progress of the society, to the help of all walks of life, to the concern of the Chinese compatriots, to the reconstruction of their homes, and then you want to say to the children of the Wenchuan earthquake

Simple calculation of 65 * 73 + 65 * 27 + 80

65*73+65*27+80
=65*（73+27）+80
=65*100+80
=6500+80
=6580

Simple operation of 44 * 44 + 44 + 44 * 55

44*44+44+44*55
=44*44+44*1+44*55
=44*(44+1+55)
=44*100
=4400

Simple calculation of 44 × 44 × 44 × 55 + 44

44×44+44×55+44
=44×44+44×55+44×1
=44×（44+55+1）
=44×100
=4400

How to calculate 35 × 55 + 35 + 35 × 44 simply

Using the distribution law of multiplication (a + b) × C = a × C + B
×c
Now it's (a + B + C) × d = a × D + B × D + C × D
There's a 1 hidden here
35×55+35+35×44
=35(55+1+44)
=35*100
=3500