how to solve 2x^2 - 4x = 3

Answers

Answer 1

Answer:

1 ± i(1/2)√2

Step-by-step explanation:

Write this quadratic in standard form:  subtract 3 from both sides.  This results in 2x^2 - 4x - 3 = 0.  Let's apply the quadratic formula.  The coefficients of the x terms are 2, -4 and -3, so the discriminant is (-4)^2 - 4(2)(-3), or 16 - 24 = -8.

Following the format of the quadratic formula, we get

     -(-4) ±i2√8       4 ±i2√2        

x = ----------------- = --------------- =  1 ± i(1/2)√2

               4                    4


Related Questions

Please help I beg like right now and explain peae

Answers

Answer and Step-by-step explanation:

When we take a look at the graph, we can see that at around 1 gallon, which would be halfway between 0 and 2, the line is underneath $5.

That means we can eliminate any number that is or above $5.

That leaves us with answer choices A and C.

Let's go to a point that is easily readable. Point (4, 15) is readable, and we can use this to find the price per gallon.

Divide 15 by 4. We get 3.75 as the result.

This means that the answer choice is:

C. The cost of gas is $3.75 per gallon.

#teamtrees #PAW (Plant And Water)

Order the list of decimals from least to greatest:.56, .056, .05, .6, .005
PLEASE HELP ASAP

Answers

.056, .005, .05, .6, 56
0.005, 0.05, 0.56 ,0.6

Help, please!! I really need a correct answer, please don't answer to get points. :(

Answers

Answer:

Multiyply all 3 numbers to get your answer.

Step-by-step explanation:

4.5*2*2

Answer: 1st one is 18

second one is 44

Step-by-step explanation:

2*2*4.5=18

A=2(wl+hl+hw)=2·(2·4.5+2·4.5+2·2)=44

2. 64 oz = ? lb
A. 2 lb
B. 4 lb
C. 8 lb
D. 128 lb

Answers

Answer: b) 4lb

Step-by-step explanation:

Answer:Your answer is B

Step-by-step explanation:

64 oz is= to 4 lb

What is c? 4(c - 3) = 8

Answers

Answer:

4 (c - 3) = 8

4c - 12 = 8

4c = 8 + 12

4c = 20

c = 20 ÷ 4

c = 5

Hope it helps!

Solve the following quadratic equation for all values of xx in simplest form.
5(x^2-4)+10=10

Answers

5x^2-20=0
X^2-4=0
x^2=4
X= +2
X=-2

HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP

Answers

Answer:

so how many units are they away from each other

Step-by-step explanation:1,

1.1-2.0  how many units are they away from each other

u could drag the number from the top to the chart below

good luck!

In the third quarter of 2001, the median sale price for a single-family
home in Putnam County, New York, was $259,970. A year earlier, the
price was $242,555. What was the percent increase?

Answers

Answer:

The % increase is 7.179 but see the remark I made below. What I have given and what it could be is a rounding error. Less than 2 dollars error is not much when you are calculating something for someone just to show them how to do it.

Step-by-step explanation:

242,555 * x/100 = 259,970           Multiply by 100

242,555 * x = 259970 * 100

242,555 * x = 25997000            Divide by 242555

x = 24997000/242444

x = 107.179

That's the total increase.

What you want is 7.179%

If you take 7.179% of 242,555 and add it onto 242555 you should get 259,970

7.1797/100 * 242555 = 17413.02

17413.02 + 242555 = 259968.02

Why isn't it exact. I'm out just about 2 whole dollars. The reason is that the % isn't exact. It's only out to 3 decimal places which apparently is not enough. You can go over my numbers if you want more exactness us use something that is rounded to 7.180 if you like.

Which is bigger 3/8 or 0.25

Answers

Answer:

3/8

Step-by-step explanation:

2/8 is equivalent to 0.25.

3/8 > 2/8

0.25

Hope this helped :T

What’s the answer for NLK?

Answers

the answer of NLK should be 180

Answer:

180 degrees

Step-by-step explanation:

because NJK adds up to 180 degrees and a circle is 360 degrees. Hope this helped :)

Answer? please i really need help

Answers

4/5, you can divide both my 14

12 1/2 - (-4 1/2) = ?

Answers

Answer:

17

Step-by-step explanation:

12 1/2-(-4 1/2)

12 1/2+ 4 1/2

17

Is the following number rational or irrational?
7.11

Answers

Answer:

7.11 is a rational number, because it is a terminated decimal and can be expressed as a fraction.

Answer:

Rational

Step-by-step explanation:

7.11 contains a non-continuous decimal unlike pi or 1/3

HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP

Answers

Answer:

i think the answer might be C

I think it’s c too. U should check

Please answer correctly

Answers

Answer:

answer correctly definition.

Step-by-step explanation:

When something is correct, it is right or accurate. The correct answer to a problem is the right answer, so if you answered to a problem right, you answered it correctly.

what is the question for this?

let me know so i can help!

Choose the three examples that can be measured with volume.
A. the space inside a paper bag
B. the amount of water in a pond
c. the space covered up by a poster
D. the amount of soup a bowl will hold
E. the amount of space on the surface of a table

Answers

The correct answer is letter C

Consider the functions below. f(x)=|x+2| AND g(x)=x+8

Which of the following is the solution to f(x)=g(x) ?

A. (-5,3)
B. (-3,1)
C. (-2,-8)
D. (0,8)

Answers

Your answer is a because it is

PLEASE HELP! Whoever solves it first gets Brainliest!

Answers

Answer:

There mistake was on step three because 5 x 5 is 25 and the answer he got was 80.

Step-by-step explanation:

how many ft do 26.2 miles equal

Answers

Answer: 138,336

Step-by-step explanation:

The Answer is 138336 Feet!

On Tuesday Jack bought four boxes. On Wednesday half of all the boxes that he had were destroyed. Write an expression for how many boxes Jack has now.

Answers

Don’t check the links

En cierta ocasión a Verónica le ofrecieron en su trabajo un aumento de 15 % en su salario mensual base, el cual era de $11 000.00, entonces me pidió que si le podía ayudar a determinar cuánto dinero le iban a aumentar. ¿Ya sabes cómo ayudar a Verónica?

Answers

Answer:

$12,650

No

Step-by-step explanation:

The computation of the increase in salary is shown below:

GIven that

The salary is $11,000

And, the increment percentage is 15%

So based on the above information

The salary after increment is

= $11,000 + $11,000 × 15%

= $11,000 + $1,650

= $12,650

No we dont know how to help veronica

A 52 foot ladder is set against the side of a house so that it reaches up 48 feet. If Jace
grabs the ladder at its base and pulls it 7 feet farther from the house, how far up the
side of the house will the ladder reach now? (The answer is not 41 ft.) Round to the
nearest tenth of a foot.

Answers

Answer:

44.4

Step-by-step explanation:

yes

Answer:

44.4

Step-by-step explanation:

i tried it nd it worked ;)

Blake snacked on a bag of chips while watching a movie, After the movie 7/8 of the bag remained uneaten. His dog got into the bag later and ate 3/5 of the remaining chips which expression can be used to find the fraction of the original whole bag of chips that Blake's dog ate? A 3/5 - 7/8
B 3/5 x 7/8
C 3/5 + 7/8
D 3/5 ÷ 7/8​

Answers

Answer:

Step-by-step explanation:

3y+10= -5x and 5-2x=5y
have to solve with elimination or substitution please help I don't get how

Answers

Answer:

Answers In Images Below \/

Step-by-step explanation:

A group of students was asked about the number of e-mails they each sent that day. The results are: 0,0,0,0,1,2,2,3,5,5, 8, 9, 10, 10, 10 Which histogram correctly shows the data set?

Answers

Answer:

Step-by-step explanation: I don’t know I’m sorry

Answer:

is the photo

Because I had that question

PLEASE HELP NO LINKS NO STEALING POINTS!!

Answers

Line 1 = 1/4

Line 2 = -4

Line 3 = -1/3

[graph attached, red is line 1, blue is line 2, and green is line 3]

Solve the system of equations using elimination


10x−3y−81=0

−5x−7y−19=0

x = ?
y = ?

Answers

Answer: i took a screen shot not sure if that is what you need but i hope it helps

Step-by-step explanation:

If right pleas make brainly

Find the total surface area of a cuboidal room whose
length ,breadth and height are 9m ,5m and 3m.
respectively.

Answers

Answer:

174cm^2

Step-by-step explanation:

Given data

L=9m

W=5m

H=3m

The formula for the total surface area of a cuboid is

SA=2lw+2lh+2hw

substitute

SA=2*9*5+2*9*3+2*3*5

SA= 90+54+30

SA= 174cm^2

Hence the surface area is 174cm^2

If 16*x=1/64, find the value of x

Answers

Answer:

I think it is x=1/1024 not sure but try it

Answer:

x = - [tex]\frac{3}{2}[/tex]

Step-by-step explanation:

Assuming you mean

[tex]16^{x}[/tex] = [tex]\frac{1}{64}[/tex]

note that 16 = 4² and 64 = 4³ , so

[tex](4^{2} )^{x}[/tex] = [tex]\frac{1}{4^{3} }[/tex]

[tex]4^{2x}[/tex] = [tex]4^{-3}[/tex]

Since the bases on both sides are equal, both 4, then equate exponents

2x = - 3 ( divide both sides by 2 )

x = - [tex]\frac{3}{2}[/tex] ( = - 1.5 )

A toy store’s percentage of markup is 25%. A modeltrain costs the store $120. Find themarkup.

a.$120 b. $30c. $90 d. $150


(pls help)

Answers

The correct answer is letter B
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