1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Arturiano [62]
3 years ago
9

Solve x2 + 4x − 4 = 0

Mathematics
2 answers:
hoa [83]3 years ago
7 0

Answer:

third option

Step-by-step explanation:

Given

x² + 4x - 4 = 0 ( add 4 to both sides )

x² + 4x = 4

Using the method of completing the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(2)x + 4 = 4 + 4, that is

(x + 2)² = 8 ( take the square root of both sides )

x + 2 = ± \sqrt{8} = ± 2\sqrt{2} ( subtract 2 from both sides )

x = - 2 ± 2\sqrt{2}

Mumz [18]3 years ago
5 0
The answer is the third choice
You might be interested in
The frequency distribution shows the number of registered motor vehicles for a random sample of 200 California households.
erastovalidia [21]

Answer:

1). Mean = 2.275

2). Median = 2 vehicles

Step-by-step explanation:

From the given table,

Number of vehicles (x)         Frequency (f)      (f)×(x)             Cumulative freq.

                  0                                    11                  0                           11

                  1                                     52                52                        63

                  2                                    66                132                      129

                  3                                    35                105                      164

                  4                                    19                  76                       183

                  5                                    12                  60                       195

                  6                                     5                  30                       200

                                                                          \sum (f\times x) = 455

Number of households = 200

Mean = \sum \frac{f.x}{n}

          = \frac{455}{200}

         = 2.275

Median = value of \frac{(n+1)}{2}th observation

             = value of \frac{201}{2}th observation

             = Value of 100.5th observation

             = Since 100.5th observation lies in the row of cumulative freq. = 129

             = 2

Therefore, median number of registered vehicles per California household

= 2 vehicles

6 0
3 years ago
(8-9)-(9+3)*5<br> 5+(5+5+6)+9<br> (5/3-3)<br> 2*3+(4*2)/2
pashok25 [27]

Answer:

If you need any further help, feel free to let me know

Step-by-step explanation:

The answers are

(8-9)-(9+3)*5=-61

5+(5+5+6)+9=30

(5/3-3)= -4 over 3 or -4/3 or -1.3 or -1 1/3 depends on what your choices are but all those are correct

2*3+(4*2)/2=10

6 0
3 years ago
Write the following equation in slope intercept form. y – 3 = -2 (x -5)
Phantasy [73]
This equation is currently in Point Slope Form. You can easily convert this form to Y Slope Intercept by following these steps.

Add 3 to both sides.

y = -2(x-2)

Simplify.

y = -2x + 4
5 0
3 years ago
Read 2 more answers
A pizza place offers 4 different cheeses and 10 different toppings. In how many ways can a pizza be made with 1 cheese and 4 top
mylen [45]

Answer:

Step-by-step explanation:

Assuming the toppings don't have to be the same

4*10*10*10*10=4000

If the toppings have to be different:

4*10*9*8*7=20160

8 0
3 years ago
Find the product -1.2(0.04)
patriot [66]

Answer:

-0.048

Step-by-step explanation:

-1.2 * 0.04 = -1.2 * 4 / 100 = -4.8 / 100 = -).048

4 0
2 years ago
Other questions:
  • Need help please and thank u
    14·1 answer
  • a survey was done and a company found that 492 out of 500 batteries were good if 6000 batteries were produced how many would be
    8·1 answer
  • How do you find the third side if a right triangle??
    5·2 answers
  • 3 teachers share 2 packs of paper equally how much does each teacher get
    8·1 answer
  • Pleasee help meeeeeee
    5·1 answer
  • Help this is my midterm
    12·2 answers
  • 5/12,3/8,6,14in ascending or<br><br><br>der​
    15·1 answer
  • A tool box has the dimensions of 10 in by 4 in by 7 in. If Magnus plans to double all three dimensions to build a larger tool bo
    8·1 answer
  • Someone please help me I’ll give out brainliest please dont answer if you don’t know
    13·2 answers
  • (06.02 LC)<br> Simplify (3x² - 2) + (2x² - 6x + 3).
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!