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2X & # 178; + 4x-3 = 0 to solve the equation
2x²+4x-3=0
x²+2x=3/2
(x+1)²=5/2
x+1=±√10/2
x=(-2±√10)/2
Given the quadratic of x-4x + y-10y + 29 = 0, find the value of quadratic of X + 2XY + y
x^2-4x+y^2-10y+29=0
x^2-4x+4+(y-10y+25)=0
(x-2)^2+(y-5)^2=0
x-2=0 x=2
y-5=0 y=5
x^2+2xy+y^2=(x+y)^2=(2+5)^2=7^2=49
Known: x2-4x + y2-10y + 29 = 0, find (x + y) 2
(1) Using the complete square formula, x2-4x + y2-10y + 29 = 0
（x-2）^2+(y-5)^2=0
So X-2 = 0
y-5=0
So x = 2, y = 5
So (x + y) ^ 2 = (2 + 5) ^ 2 = 49
Choose any four numbers from the five numbers of 2, - 3,4, - 5,6, and use the mixed operation of rational numbers, so that the result of the operation of the four numbers is 24. Each number can only be used once
6+-3=3
3*4=12
12*2=24
One half plus one sixth plus one twelfth to nine hundredth of the number logical reasoning problem, how to calculate
1/2+1/6+1/12+…… +1/9900=1/(1·2）+1/(2·3）+1/(3·4)+…… +1/(99·100）=(1-1/2)+(1/2-1/3)+(1/3-1/4)+…… +(1 / 98-1 / 99) + (1 / 99-1 / 100) = 1-1 / 100 = 99 / 100, because 1 / (n · (n + 1)) = (1 / N) - 1 / (n + 1)
Find the integer solution of inequality system 3 (x-4) = 6-2 (1-x)
The process should be detailed
3(x-4)=6-2(1-x)②；
The results are as follows,
-4x
How to calculate the area of triangle
Multiply the bottom by the height and then multiply by half
There are 24 tons of cement in the construction site. The first time, 3 / 8 of cement was used, and the second time, 1 / 3 of cement was used. How many tons more cement was transported in the first time than in the second time?
24x3 / 8-24x / 13 = 9-8 = 1 ton
The bottom diameter of a cylinder is 2 decimeters, the surface area is 12.56 square decimeters, and the height of the cylinder is______ Decimeter
Bottom area: 3.14 × (2 △ 2) 2 = 3.14 (square decimeter), side area: 12.56-2 × 3.14 = 6.28 (square decimeter), height: 6.28 △ 2.14 × 1, = 6.28 △ 6.28, = 1 (decimeter); answer: the height of the cylinder is 1 decimeter
A number is a factor of 48 and a multiple of 3. What's the number?
Given that a, B and C are prime numbers, and a + B = C, what is the minimum value of a * b * C?
A number is a factor of 48 and a multiple of 3. What's the number?
This number can be 3, 6, 12, 24
Given that a, B and C are prime numbers, and a + B = C, what is the minimum value of a * b * C?
In the case of minimum value,
A = 2, B = 3, C = 5
A * b * C = 30
RELATED INFORMATIONS
- 1. If a = 2 of B, the value of [2B + b] &# 178; - - - [2b-b] &# 178
- 2. Given X & # 178; + X-1 = 0, then x & # 179; + 2x & # 178; - 3=
- 3. (a-b)³×（a-b）²=?(x-y)×（y-x)³=?
- 4. If the polynomial - 5x & # 179; - (M + 2) x & # 178; + (3-N) X-1 about X does not contain quadratic term and linear term, the value of M & # 8319; is obtained
- 5. Solving inequality: 4x-4x + 1
- 6. The square of 3x minus 7x plus 2 is less than 0
- 7. The multiplication rule of rational numbers: multiply two numbers, get () with the same sign, get () with different sign, and multiply () together If 0 is multiplied by any number, you will get (). In addition, if 1 is multiplied by any number, you will get () -Multiplying 1 by any number yields ()
- 8. A problem of solving quadratic inequality of one variable 2x²-7x+6 =2(x²-3.5x)+6 =2(x²-3.5x+3.0625-3.0625)+6 =2(x²-3.5x+3.0625)-6.125+6 =2(x-1.75)²-0.125
- 9. "Autumn of the Three Gorges" reading questions! It's autumn already. The autumn color of the Three Gorges begins to appear from the orange and pomelo trees on both sides of the river. These trees grow on the steep rocks, and their leaves are as hard and straight as the blue rocks. In autumn, they are more and more green and black, and the fruits are turning from green to yellow, and gradually emerging from the middle of the leaves, They began to give off a fragrance, so that the Three Gorges full of Mature autumn atmosphere In the morning, the transparent dew is shining, and the wind in the gorge is cool, as if the orange and pomelo trees all over the mountain have a layer of white frost, fresh and clean; when the sun comes out, the dew disappears, the orange and pomelo trees are shining with sunshine, green leaves and golden fruit; the Three Gorges is a beautiful autumn At noon, the peaks are covered with gold armour, the sun is jumping on the water surface, and the Yangtze River becomes warm, like a golden scale python, rolling, whistling and rushing away. At the same time, it throws the surging and jumping brilliance to the cliffs on both sides, so the whole Canyon is rippling, and the Three Gorges is full of the warm atmosphere of autumn In the afternoon, before the sun sets, a layer of cyan fog rises early in the gorge. This makes the dusk in the gorge come early and go late. So, in the cyan transparent dusk, the reflections of the cliffs on both sides rush to the center of the river, leaving a bright sky on the river. The Yangtze River flows quietly and gently, like a bright belt Night, at last, comes. The fishing lights on the bank and the lights in the middle of the river light up one after another, together with the red halo they reflect on the water surface, making the Yangtze River seem to blink and sleepy. Only occasionally passing barges sound their sirens and carve a luminous road on the water surface. So the lights of the fishing lights, like waking up, sway gently on the water surface Perhaps because the mountain here is too high, the canyon is too deep, the sky is too narrow, and even the moon comes very late. At first, I can only feel its hazy green light, which is connected with the dusk. I don't know when it suddenly appears on the mountain. It's like growing out of the mountain, which is a part of the mountain. It's like a huge, polished and shiny mica stone, The contrast is very obvious - the mountain is black like ink, standing steeply, leaning towards the center of the river, as if it is about to fall down; and the moon, from the top of the mountain, along the vertical deep valley, spills its bright light all the way to the river. It is like waterfalls flying down in the air, and like pieces of pure brocade hanging down from the mountain This day is the Mid Autumn Festival Proper use of rhetorical devices can make the scenery vivid and vivid. Pick out your two favorite sentences with rhetorical devices, analyze their rhetorical devices and give your reasons for liking them Sentence (1) uses [] (rhetorical device) Reasons for liking Sentence (2) uses [] (rhetorical device) Reasons for liking
- 10. What inequality is the square of x-2x-3 > 0 and how to solve the set
- 11. How to solve the equation 2x & # 178; - 4x + 3 √ X & # 178; - 2x + 6 = 15
- 12. Finding definite integral 1, ∫ (1-2) {[(INX) ^ 2] / (x ^ 3)} DX 2, ∫ (0-1) {X / [e ^ (5x)]} DX integration by parts
- 13. When x ∈ [0,1] finding definite integral ∫ √ (4-x ^ 2) DX Let's see. Let's set X = 2sint t ∈ [0, PI / 6] DX = 2costdt The original formula = ∫ 2cost * 2cost DT = 4 ∫ (cost) ^ 2 DT can't be changed to 4 * 1 / 3 (cost) ^ 3 here? If you want to change, can it be changed to 1 / 2 (cost) ^ 2 only in the form of ∫ costdcost?
- 14. In high school mathematics definite integral What does DX in F (x) DX stand for? How to calculate between DX?
- 15. ∫ 1 / (x ^ 2-4x + 3) DX, indefinite integral,
- 16. Seeking indefinite integral ∫ 1 / 1 + 4x ^ 2 DX
- 17. Evaluation: 1 + X + X & # 178; + X & # 179; + X & # 8308; + ······· + X & # 8319; n = 2011 and 1 + X + X & # 178; + X & # 179; = 0
- 18. 3x & # 179; Y & # 179; * (- 3 / 2x & # 178; y) & # 179; + (- 1 / 3x & # 178; y) & # 179; * 9xy & # 178; when x = - 1, y = - 2 3x³y³*(-2/3x²y)³+(-1/3x²y)³*9xy²
- 19. Sum: SN = 1-3x + 5x ^ 2-7x ^ 3 +. + (2n + 1) (- x) ^ n (n belongs to n *)
- 20. Simplification: √ (x + 3) & # 178; + √ (X-2) & # 178; + √ X & # 178; - 10x + 25 (3)