solution of equation x^2-2x=-2

Answers

Answer 1

Answer:

[tex]x=1\pm i[/tex]

Step-by-step explanation:

The given equation is :

[tex]x^2-2x=-2\\\\x^2-2x+2=0[/tex]

The above equation is a quadratic equation whose solution can be given by :

[tex]x=\dfrac{-b\pm \sqrt{b^2-4ac} }{2a}[/tex]

Here,

a = 1, b = -2 and c = 2

So,

 [tex]x=\dfrac{-(-2)\pm \sqrt{(-2)^2-4(1)(2)} }{2(1)}[/tex]

So,

[tex]x=1+i,1-i\\\\x=1\pm i[/tex]

So, the solution of the equation is [tex]1\pm i[/tex].


Related Questions


Helpppppppppppppooopp

Answers

Answer:

I can't see clearly

Step-by-step explanation:

solve the equation. -4/9 f= -3​

Answers

Answer:

27/4

Step-by-step explanation:

Multiply both sides by 9/(-4).

9/−4 * −4/9 f = 9/−4 * −3

f = 27/4

HURRY 50 POINTS Which of the points belong to the graph of the equation x–2y=4?
A (6,1)
B (-6,-5)
C (0,-2)
D (-1,3)
THESE ARE ALL YES/NO QUESTIONS AND PLEASE DONT GIVE ME A LINK TO THE ANSWER

Answers

Answer:

C (0,-2)

Step-by-step explanation:

Any line can be graphed using two points. Select two x x values, and plug them into the equation to find the corresponding y y values. Tap for more steps.

As you have two different variables (x and y) you aren't looking at a linear function but at a 3d function instead. Make sure you have the correct heading

Note that this equation is linear since all of the terms in  

x and y are of degree at most  1.

answer in simplest radical form

Answers

[tex]64*36=x^{2} \\2304=x^{2} \\x=48[/tex]

Randy had to hang a rectangular mirror on a wall. The length of his mirror was ⅚ yards long and ¾ yards wide. What is the area of the mirror?​

Answers

Answer:

5/8

If you multiply 3/4 by 5/6 you will get 5/8

Suppose Tabitha finds an annuity that pays 7.0% annual interest, compounded semiannually. She decides to invest $650
semiannually in this annuity for 5 years. How much interest does she earn during the 5 years?
Round your answer to the nearest cent.
Do NOT round until you have calculated the final answer.

Answers

Answer:

Rounded to the nearest cent, over 5 years she will earn $ 916.89.

Step-by-step explanation:

Since Tabitha found an annuity that pays 7.0% annual interest, compounded semiannually, and she decided to invest $ 650 semiannually in this annuity for 5 years, to determine how much interest she will earn during the 5 years the following calculation must be performed:

650 x (1 + 0.07 / 2) ^ 5x2 = X

650 x (1 + 0.035) ^ 10 = X

650 x 1,035 ^ 10 = X

916,889 = X

Thus, rounded to the nearest cent, over 5 years she will earn $ 916.89.

Answer: 1125.41

Step-by-step explanation:

First, let’s find out how much is in the account after 5 years. We will use the savings annuity formula

A(t)=d((1+r/n)n⋅t−1)r/n

to find the value of A(5). We know that r=0.07, d=$650, n=2 compounding periods per year and, t=5 years. Substitute these values into the formula.

A(5)=$650 ((1+0.07/2)5⋅2−1)/(0.07/2)

Simplifying gives

A(5)=$650 ((1.035)10−1)/(0.035),

thus

A(5)=$7,625.41.

The sum of all deposits D5 is given by 5⋅2⋅$650=$6,500. Now, substitute these numbers into

A(5)=D5+I5

and solve for I5. This gives

$7,625.41=$6,500+I5,

yielding the total interest paid as $1,125.41. Enter 1125.41 as the answer.

(DONT ANSWER IF YOU GOING TO GIVE SOME TYPE OF LINK )please help me I’m begging ya I really need help if I don’t finish in 20 min I’m going to get a whopping and it will get lock!!! My teacher strict she won’t let me do it. (NO LINKS)
(NO LYING) especially if you don’t know it!!!!

Answers

1. 1143.36.

2. Withdrawal

3. Deposit

4.C

5.2185.07

chose the number equal to -9 times -1/3

Answers

i’m pretty sure it’s 3. The number equal to -9 times -1/3 is 3

At a drop-in mathematics tutoring center, each teacher sees 4 to 8 students per hour. The probability that a tutor sees 4 students in an hour is 0.12;5 students, 0.13; 6 students, 0.30; and 7 students, 0.33. Let be the number of students per hour of a randomly selected teacher.

Answers

Answer:

0

Step-by-step explanation:

am not sure, , have not studied

____ + g − g = k
help

Answers

Answer: umm it k

Step-by-step explanation: k+g-g=k

g-g=0

k=k

Simplify: 10(-5x+4)
Jejdjejehhe

Answers

Answer:

-50x + 40

Step-by-step explanation:

10(-5x+4)

-50x + 40

Calculate the area of the above triangle
07 square units
28 square units
14 square units
30.5 square units

Answers

Answer:

14 square units

Step-by-step explanation:

Equation:

Area of a triangle = h*b/2

Variables:

h = 4 units

b = 7 units

Solve:

h*b/2

= 4 units * 7 units /2

= 14 square units

Please mark brainliest if this helped!

How many 3 digit numbers can be constructed from the digits 3 4 5 6 7

Answers

Answer:

60 numbers

Step-by-step explanation:

3 4 5 6 7

for everything starting with 3

345

346

347

354

356

357

364

365

367

376

375

374

we know the results will be the same

there was 12 numbers in that sequence

theres 4 other numbers it could start with

12 + (12x4) = 12x5

60

help, can you tell if im right?

Answers

Answer:

Yes, all of your answers are 100% correct

Step-by-step explanation:

You correctly set the values equal to the numerator or denominator (minutes = minutes) and any value will equal the same value.

Erica finds a block of cheese in her
fridge. Originally, the block weighed
126 g, but there is only 60% of it left.
How many 10-g wedges can she cut
from the cheese that is left?
8
21
12
7

Answers

Answer:

7

Step-by-step explanation:

126 g is what you originally had which=60% of whats left

you have to find out how many 10 wedges she can cut from the cheese that is left over

Work Shown:to find how much is left you have to multiply 126 by 60% remember when you multiply you have to move the decimal, and decimal is moved twice, so the answer would be 75.60 after you were done solving it and the number that is closest would be 70 so you would multiply 10 by 7=70 and the reason you pick that is because it is closer to 75.60.

So 7 is the answer.

The length of a rectangle is 3 times the width. The area of this rectangle is 243 feet squared.
What are the dimensions?
Width =____feet (this is the short side)
Length=____feet (this is the long side that is 3 times the width)

Answers

Step-by-step explanation:

width = x

length= 3x

Area = length * width

243=3x * x

3÷243 =3x^2÷3

√81=√x^2

x=9

3x=3*9=27

Width=9

Length=27

PLEASE HELP ME

Drag the tiles to the boxes to form correct pairs. Not all tiles will be used.
Match the expressions with their simplified forms.

Answers

Hence the matching expression is:

√2 * √8 = 4

√80 = 4√5

√5/√20 = 1/2

√20 = 2√5

Solving the rational expression

Given the following expressions, we are to match with the values in box.

For the expression

√2 * √8 = √2 * √2*4
√2 * √8 = √2 * 2√2

√2 * √8 = 4

For the expression √80
√80 = √16*5
√80 = 4√5

For the expression √5/√20
√5/√20 = √5/√4*5
√5/√20 = √5/2√5

√5/√20 = 1/2

For the expression √20

√20 = √4*5
√20 = 2√5

Hence the equivalent matching expression are;

√2 * √8 = 4

√80 = 4√5

√5/√20 = 1/2

√20 = 2√5

Learn more on rational expression here: https://brainly.com/question/29061047

#SPJ1

One equation in a system is y = 2x - 4. Which equation gives the system no solution?

y = 2x - 4

y = 2x + 9

y = 1/4x - 4

y = -2x + 4

Answers

Answer:

[tex]y = 2x + 9[/tex]

Step-by-step explanation:

Step 1: I have to compare the equation given to the equation of a straight line

From the question, we have:

[tex]y = 2x - 4 \\ y = mx + c[/tex]

hence m = 2 and c = -4

So, the choice B: y = 2x + 9

Gives : m = 2 and c = 9

Hence since m is the same that is (= 2) and c is different, hence the equation has not solution then.

So, the answer is choice B

(2z+2)(z^2+z–2) please help

Answers

Answer:

2z^3+4z^2-2z-4

Step-by-step explanation:

Distribute

2z^3+2z^2-4z+2z^2+2z-4

Simplify

2z^3+4z^2-2z-4

consider the following total cost functions TC=3Q^3-5Q^2+4Q+150 find the Fixed Cost Function(FC)

Answers

Answer: 150

Step-by-step explanation:

A fixed cost is referred to as a cost that does not change with the output level that is, it doesn't change when there is a rose or reduction in the amount of goods or services that are produced.

Since the total cost function is given as

TC=3Q³ - 5Q² + 4Q + 150, we can infer that from the equation the fixed cost is 150 while the variable cost is 3Q³ - 5Q² + 4Q

Find the highest common factor(HCF) of 18 and 24

Answers

18 - 2,3,6,8
24 - 2,4,6,8,12

HCF = 8

simplify - root (9+y)^2 if y <-10

Answers

Answer:

− √ ( 9 + y ) 2 > 1

Explanation:

− √ ( 9 + y ) 2 , where  y < − 10

Simplify the expression,

− √ ( 9 + y ) 2 = − ( 9 + y ) = − 9 − y

When  y < − 10 , − y > 10

Subtract  9  from both sides,

− 9 − y > 1  Hence,

− √ ( 9 + y ) 2 > 1

The value of the expression -√(9 + y)² is -9 which is more than -10. So, it is incorrect.

What is Algebra?

Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.

The definition of simplicity is making something simpler to achieve or grasp while also making it a little less difficult.

The expression is given below.

⇒ -√(9 + y)²

Simplify the expression, then we have

-√(9 + y)² = 0

(9 + y) = 0

9 + y = 0

y = - 9

More about the Algebra link is given below.

https://brainly.com/question/953809

#SPJ2

help aced and expert giving 20 points

Answers

The correct answer is 0.0625 square meters.

help please, also explain

Answers

Firstly, It says that the two triangles are similar .              

The scale factor is 2 as 12 / 6 = 2

25 + 85 = 110

180 - 110 = 70.

70 degrees

Answer:

A: 70

Step-by-step explanation:

Step One: This problem is tricky because it makes it seem more difficult than it really is. Because these angles are similar through the SAS theorem, their angles are the same. Similar means they are proportional triangles, but for this problem, the most important thing to know is that the angles of both triangles are the same. This means we can use the angles from the first triangle exactly the same way for the second triangle.

Step Two: Now that we have that out of the way, we also need to know that all angles in a triangle add up to 180 degrees.

Step Three: Ok, so we have all the information we need, so now we can solve the problem. As I've said, the angles from the first triangle are the same for the angles in the second triangle. So, we would do 85+ 25= 110.

Step Four: Lastly, we would do 180 (since all angles add up to 180)-110 to figure out the missing angle: 180-110=70 degrees.

If anyone knows the answer, could you help LOL


What is the equation of the line that passes through the point (4, -7) and has a slope of -1/2 ?

Answers

Answer:

y = -1/2x - 5

Step-by-step explanation:

To solve this (and questions like it), use the formula for the equation of a line:

y=mx+c, where y and x are any given co-ordinates, m is the slope, and c is the y-intercept.

Since we know that the slope is -1/2, we can plug this into our equation to replace m:

y=mx+c

y=-1/2x+c

To find c, we plug in our co-ordinate (4,-7), so that c is the only unknown, and we can solve for it:

y=-1/2x+c

-7=-1/2(4)+c

-7=-2+c

c=-5

Now that we know c, we can finish off our equation:

y = -1/2x + c

y = -1/2x - 5

3
S
1+ 305
[tex]3 - \sqrt{5 } \div 1 + \sqrt[3]{5} [/tex]

Answers

Step-by-step explanation:

can you throw more light on what you want us to find?

The product of two factors is x2+ 6x + 8. If one of the factors is (x + 4), what is the other factor?

Answers

(x + 4) (x + 2)
=x^2 +2x + 4x + 8
=x^2 + 6x + 8
the other factor is (x + 2)

What is the solution to the linear equation?
2/3 x-1/2=1/3+5/6x

O x = 5
0 x = 1 - 2
0 x =
O x=5

Answers

[tex]2.3x - 5.6x = 1.3 + 1.2 \\ - 3.3x = 2.5 \\ - x = 0.75 \\ x = - 0.75[/tex]

i hope it helps u

There are 63 students marching in a band, and they’re marching in 7 rows. How many students are in each row?

Answers

There are 9 students in each row.

LOOK AT THE PHOTO PLEASE

Answers

Answer:

The answer to the question provided is 7.

Step-by-step explanation:

[tex] \: \: \: \: \: \: \: 2x - 3 = x + 4 \\ \frac{ - x \: \: \: = \: - x}{x - 3 = 4} \\ \frac{ \: \: \: \: \: \: + 3 = + 3}{x = 7} [/tex]

[I apologize if the answer is inaccurate]

Other Questions
1. Find the following limits. 2x2 - 8 a) lim * 4x2 + 2 b) lim -0 c) lim 2x +5x+3 2x+3 choose the organism that shows the characteristics given in each number. choose more than one.1. moves from one place to another using its own reflexes or body.a. narrab. pencilc. lizardd. rocke. crabsf. paperg. fish2. develops into mature individual or species.a. narrab. pencilc. lizardd. rock e. crabsf. paperg. fish3. take in food and excretes wastes.a. narrab. pencilc. lizardd. rocke. crabsf. paperg. fish4. breathe.a. narrab. pencilc. lizardd. rocke. crabs f. paperg. fish5. reproduce its own kind whether sexual or asexual.a. narrab. pencilc. lizardd. rocke. crabsf. paperg. fish PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!All matter has the same properties. A.TrueB.False Matt sells usually sells goods at $130 each, he gives Anil a trade discount of $10 so he sells goods to Anil for $120. He also offers a cash discount of 5% for prompt payment. Matt is registered for VAT. This means that $120 x 5% = $6 cash discount is available. How much output VAT should Matt include on Anil's invoice? By far the most successful alternative approach to bail is being released on one's own recognizance.a. Trueb. False 15 FT-12 FT16 FT9 FTWhat is the Volume:What is the Total Surface Area: Read the passage.AC vs. DCIn the 1880s, the War of the Currents began. Thomas Edison developed direct current, or DC, a type of electricity that flows in one direction. By 1887, DC was in use around the United States. It had some drawbacks, though. Converting it to lower or higher voltages was difficult; that is, the current's force couldn't be changed easily. Transmitted at the low voltage needed for use in homes and businesses, it lost power after traveling only a mile. Meanwhile, Nikola Tesla was working with alternating current, or AC. AC reverses direction many times per second and can be changed to different voltages. At high voltage, it can be transmitted efficiently, traveling hundreds of miles with little energy loss. Because of its advantages, AC triumphed by the end of the nineteenth century.What is the main idea of the passage?AC has distinct advantages over DC, so AC won the War of the Currents.AC reverses direction and can be converted to lower or higher voltage. What is the main idea? A gas has no definite:a shapeb volumecweightd both A and B which type of montage that uses deep focus and long takes to avoid cutting? Mimi is tacking 6 posters on her wall. Every poster needs a tack in each corner. What is THE LEAST number of tacks Mimi needs to hang the posters so that each can be seen completely? Why is racism a problem in America In the aggregate demand-aggregate supply model, as a result of a decrease in aggregate demand, ceteris paribus, the price level ________ and real gross domestic product (GDP) ________.a. increases; remains unchangedb. decreases; decreasesc. increases; decreasesd. decreases; increasese. remains unchanged; increases Help please thank youu There are 4 mg of lead present in 2000 g of a water sample. What is theconcentration of lead in m? what is the effect of a $1 pricetrop increase when tropicana is not located in an in-store display? Race) The longest racial grouping of respondents to the 2012 GSS was______, with ______%. The second-largest grouping was _____, with ______%. Which statement about the figure below is true? The Maximin Criteria is equivalent to O choosing the best among the highest outcomes. O choosing the Nash equilibrium O choosing the best among the worst outcomes O none of these answers is correct O choosing the dominant strategy Will give brainliest Find the area of this triangle.Round to the nearest tenth.8 m6212 m[?] m2 The function h defined by h(t)=(-4.9t + 29.4)(t+2) models the height in meters, of an object t seconds after it is launched. When will the object hit the ground?