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
adelina 88 [10]
3 years ago
11

X^2 - 6 = -2x Find the solution by completing the square

Mathematics
1 answer:
Lunna [17]3 years ago
6 0

Answer:

x = -1±sqrt( 7)

Step-by-step explanation:

x^2 - 6 = -2x

Add 2x to each side

x^2 +2x- 6 = -2x+2x

x^2 +2x -6 = 0

Add 6 to each side

x^2 +2x- 6+6 = 6

x^2 +2x = 6

Take the coefficient of x

2

Divide by 2

2/2 =1

Square it

1^2 =1

Add this to each side

x^2+2x+1 = 6+1

(x+1)^2 = 7

Take the square root of each side

sqrt((x+1)^2) =±sqrt( 7)

x+1 = ±sqrt( 7)

Subtract 1 from each side

x+1-1 = -1 ±sqrt( 7)

x = -1±sqrt( 7)

You might be interested in
You bought the new PS5 and 4 games for $660. the PS5 cost $499 and each game cost the same amount. Write an equation that can be
nirvana33 [79]
4x+499=660
X=40.25
X equeals the amount for each game.
4 0
2 years ago
Mrs. Smith gave two classes the same quiz. She randomly selected 5 students from each class to compare the classes. The scores o
Tasya [4]

The mean and range for class A are 84.4 and 20 while the mean and range for class B are 83.6 and 8. Class B is more consistant then class A.

<h3>How to calculate the mean?</h3>

We can see from the data that the consistency of class B is more becuase the repeatation of the same score is more in class B then class A  and the range of class B is also less then the class A.

It should be noted that mean simply means average. It's the addition of the numbers divided by the total numbers.

In this case, the computation will be:

Class A: Mean = 422/5= 84.4.

Range: 94-74 = 20

Class B: Mean = 418/5 = 83.6.

Range= 88-80 = 8

Learn more about mean on:

brainly.com/question/1136789

#SPJ1

4 0
1 year ago
What is the largest power of 2 that is a divisor of 13^4 - 11^4?
OverLord2011 [107]

Answer:

2^5

Step-by-step explanation:

Given:

(13^4 - 11^4)(13^2+11^2)

add all together with exponents

=48*290

= Then turn into a smaller exponent

= 2^4 * 3 * 2*145

combine like terms

2^4 *2

=2^5

5 0
2 years ago
Read 2 more answers
What is the best name for the part of the figure identified by
BigorU [14]
It is Line of symmetry
3 0
3 years ago
Read 2 more answers
A kitchen floor has an area of 48 square feet.One tile covers 0.75 square goot.How many tiles would be needed to cover the entir
pshichka [43]
@Texaschic101 you are correct .75 x 64 will indeed equal 48 sq feet. so your answer will be 64 tiles. hope this was of help!
4 0
2 years ago
Other questions:
  • Please help Math Analysis !!!!!
    15·1 answer
  • Corresponding angles form when a transversal intersects with two parallel lines.
    8·1 answer
  • Sixty one thousandths written in decimal notation
    12·2 answers
  • If you order these 3 from Least I will give 20 points and mark as brilliant 1.)6 3/5, 7 3/4,6.55,6,7.09 2.) 3 8/20,-3.3,3.41,3.2
    10·1 answer
  • (X2y3)1/2(x2y3)1/3=xa/3ya/2 where a is constant, is true for all positive values of c and y, what is value of a?
    13·1 answer
  • Rocco used these steps to solve the equation 4x + 6 = 4 + 2(2x + 1). Which choice describes the meaning of his result, 6 = 6?
    13·1 answer
  • Domain range and function
    11·1 answer
  • Can you help me with this one?
    11·1 answer
  • Mort makes. Beaded necklaces that he sells for $32 each. About how much will Mort make if he sells 36 necklaces at the local fai
    9·1 answer
  • Please help me geometry
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!