Solving the equation (2x + 1) & # 178; - 9 = 0 with three different methods

Solving the equation (2x + 1) & # 178; - 9 = 0 with three different methods

Method 1. (2x + 1) & # 178; = 92x + 1 = ± 3x = - 2 or x = 1 method 3. Draw y = (2x + 1) & # 178; and y = 9 to see the intersection method 4. Simplify X & # 178; + X-2 = 0 cross multiplication to get (x + 2) (x-1) = 0 to get x = - 2 or x = 1
Solving equation (x + 1) &# 178; = (3-2x) &# 178;
25x²-10x+1=9
4（2y-1）²=9（3y-1）²
(x+1)²=(3-2x)²
(x+1)²-(3-2x)²=0
（x+1+3-2x）（x+1-3+2x）=0
(4-x)(3x-2)=0
x1=4 x2=2/3
(1)
(x+1)²=(3-2x)²
x²+2x+1=9-12x+4x²
3x²-14x+8=0
(3x-2)(x-4)=0
X = 2 / 3 or 4
(2)
25x²-10x+1=9
25x²-10x-8=0
(5x-4) (5x +... Expansion
(1)
(x+1)²=(3-2x)²
x²+2x+1=9-12x+4x²
3x²-14x+8=0
(3x-2)(x-4)=0
X = 2 / 3 or 4
(2)
25x²-10x+1=9
25x²-10x-8=0
(5x-4)(5x+2)=0
X = 4 / 5 or - 2 / 5
(3)
4（2y-1）²=9（3y-1）²
4(4y²-4y+1)=9(9y²-6y+1)
16y²-16y+4=81y²-54y+9
65y²-38y+5=0
65（y-5/13）（y-1/5)=0
Y = 5 / 13 or 1 / 5
If you don't understand, you can ask! Put it away
(x+1)²=(3-2x)²
（x+1）²-（3-2x）²=0
（x+1-3+2x）（x+1+3-2x）=0
（3x-2）（4-x）=0
x1=2/3 x2=4
(x+1)^2-(3-2x)^2=0
(x+1+3-2x)(x+1-3+2x)=o
(4-x)(3x-2)=0
X = 4 or x = 2 / 3
The solution is positive or negative (x = 2 / 3, x = 1 / 4)
x²+2x+1=9-12x+4x²
9-12x+4x²-(x²+2x+1)=0
3x²-14x+8=0
(x-4)(3x-2)=0
The solution is x = 4 or x = 2 / 3
Method 1: (x + 1) &# 178; = (3-2x) &# 178;
x²+2x+1=9-12x+4x²
3x²-14x+8=0
(3x-2)(x-4)=0
Get x = 2 / 3, or x = 4
Method 2: (x + 1) &# 178; = (3-2x) &# 178;
We can get x + 1 = 3-2x or x + 1 = 2x-3
So x = 2 / 3 or x = 4.
The result is x = 2 / 4
X 2 + 1 + 2x = 9 + 4x2-12x, 3x2-14x + 8 = 0. (3x-4) (X-2) = 0, x = 2 / 3 or 4
25x²-10x+1=9
25x²-10x-8=0
(5x+2)(5x-4)=0
x1=-2/5
x2=4/5
4（2y-1）²=9（3y-1）²
4(4y²-4y+1)=9(9y²-6y+1)
65y²-38y+5=0
(5y-1)(13y-5)=0
y1=1/5
y2=5/13
The law of addition in Grade Four
1. Use 3, 4, 6 and 8 to write 4 formulas with the same number of two digits plus two digits
□□+□□=□
□□+□□=□
□□+□□=□
□□+□□=□
2. Fill in the box with numbers to make the formula true
3□+□7=□□+□□=79
3. Use the law of addition to complete the following calculation
1+3+5+7+.+93...+95...+97+99
=
=
=
1. Use 3, 4, 6 and 8 to write 4 formulas with the same number of two digits plus two digits
3 4 + 6 8=102
6 8 + 3 4=102
3 8 + 4 6=102
4 6 = 3 8=102
2. Fill in the box with numbers to make the formula true
3 2+4 7=4 7+3 2=7 9
The first question is too boring
2、32+47=47+30=79
How is computer software classified? What is the main composition of a computer software system?
Computer software consists of programs and related documents. Programs are symbolic representations of instruction sequences, and documents are technical data established in the process of software development. Programs are the main body of software, which are generally stored in storage media (such as floppy disk, hard disk and CD-ROM) for use on computers. Documents are particularly important for the use and maintenance of software, With the release of software products, the main documents are user's manual, which includes the function introduction, running environment requirements, installation method, operation instructions and error information description of the software products. The running environment required by a software refers to the configuration of hardware and other software that it should have, that is, in the computer system hierarchy, the running environment of a software product is the configuration of hardware and other software that it should have, It is at least the necessary configuration of the lower layer (inner layer) of the software (including the requirements for hardware equipment and specifications, software version, etc.). Computer software can be divided into system software and application software according to its purpose
System software is mainly divided into operating system software (the core of the software), various language processing programs and various database management systems
Programs written to solve all kinds of computer problems are called application software, which can be divided into application software package and user program
The solar panels convert this energy directly into electricity
That's right, but how do I feel it's solar energy to chemical energy? Can you help me solve my problem?
Solar cell is a kind of semiconductor. When light irradiates the surface of the cell, electron hole pairs are generated inside the cell. Under the action of built-in electric field, electrons and holes diffuse and drift, forming voltage drop at the two levels of the cell, which converts the energy of light wave into electric energy!
How many square meters is an acre of land equal to?
How many square meters is an acre of land?
One mu of land is equal to 666 and 2 / 3 square meters
666 square meters
One mu of land is about 666.66 square meters
One mu of land is about 666.67 square meters, and one hectare is equal to 0.15 mu,
Square kilometer, hectare, mu, square meter, square decimeter, square centimeter conversion is 1:100
1 mu = 666.67 square meters
The laws of addition are as follows______ And______ .
The operation law of addition includes commutative law of addition and associative law of addition
A computer device has a data entry a and an operation result exit B. the following table is the result obtained by Xiaoying after inputting some data
A 1 2 3 4 5 6 ⋯
B 0 1 4 9 16 25⋯
(1) If the input number of Xiaoying is 7, what is the output number
(2) If the output number of export B is 900, what is the input number of Xiaoying
(3) If the output of spikelets is x, what is the output number
(b) square = - 1
When Xiaoying input 7, the output is (7-1) square = 36
And so on
How to convert light energy into electricity
Basically, there are three ways:
1. The light heats the semiconductor to increase the electron activity and enter the other side of the PN junction to form a potential difference and generate electric energy (such as solar cells);
2. The light wave of a certain frequency irradiates the electron migration orbit to fly out and collect the electron to obtain electric energy (laser, microwave and some photoelectric converters)
3. First change heat energy, then steam kinetic energy, and then power generation
1. Solar cells, which directly convert light energy into electricity.
2. Gather the light with concave mirror to a point, heat the water and generate electricity with steam. I want to build a device to collect light energy and use it to generate electricity? Khan, I don't know. Have you ever played 4WD? The motors on the top or other products are normally driven by electricity and then rotate. You can try using steam to drive the rotor to rotate to generate electricity (I'm not sure whether it's OK). If you can't, you can build a small generator. The principle is the content of physics textbooks for middle school. (concave mirror is to steal big drops, otherwise the generated temperature will not be able to boil the water, and how to push the water vapor to expand.)
1. Solar cells, which directly convert light energy into electricity.
2. Gather the light with concave mirror to a point, heat the water and generate electricity with steam. Question: I want to make a device to collect light energy and use it to generate electricity?
China's land measurement unit in the 1950s, section, mu, how many mu or square meters is a section equal to? This is the land issued by the state in the 1950s
One section is equal to 15 mu, one mu is equal to 666.67 square meters. In some places, one section is 10 mu, and that one mu is equal to 1000 square meters