Use completing the square to solve this quadratic equation.
Check all that apply.
x2 + 6x + 9 = 2
A. x = 3 + 4/5
B. x= -3 +2
c. x= 3 - 5
D. =-3-

Use Completing The Square To Solve This Quadratic Equation.Check All That Apply.x2 + 6x + 9 = 2A. X =

Answers

Answer 1

Step-by-step explanation:

x² + 6x + 9 = 2

(x + 3)² = 2

x + 3 = ±sqrt(2)

x = -3 ± sqrt(2)

so, B and D are correct.

control :

(-3 + sqrt(2))² + 6(-3 + sqrt(2)) + 9 = 2

9 + 2 - 6sqrt(2) - 18 + 6sqrt(2) + 9 = 2

2 = 2

correct

(-3 - sqrt(2))² + 6(-3 - sqrt(2)) + 9 = 2

9 + 2 + 6sqrt(2) - 18 - 6sqrt(2) + 9 = 2

2 = 2

correct

(3 + sqrt(2))² + 6(3 + sqrt(2)) + 9 = 2

9 + 2 + 6sqrt(2) + 18 + 6sqrt(2) + 9 = 2

38 + 12sqrt(2) = 2

wrong.

(3 - sqrt(2))² + 6(3 - sqrt(2)) + 9 = 2

9 + 2 - 6sqrt(2) + 18 - 6sqrt(2) + 9 = 2

38 - 12sqrt(2) = 2

wrong.


Related Questions

What is the value of 8 + z, when z = 5?
0 5
0 3
O 12
O 13

Answers

Answer:

8 + z = 13.

Step-by-step explanation:

8 + z = ?

z = 5

8 + 5 = ?

8 + 5 = 13.

Answer:

13

Reasoning

[tex]8+z=?[/tex] when z=5

[tex]8+5=13[/tex]

so sorry if im wasting your time its just that i need help plsssssss im gonna fail so badly so help?

Answers

The ANSWER for this question is C.85

Margie's hourly salary is $6. 75. Last week she worked a 20âhour week. How much did she earn?.

Answers

Answer:

125

Step-by-step explanation:

6.25 x 20 = 125

what is an complementary angle?

Answers

Step-by-step explanation:

Angles whose sum is 90° .

For ex - 30° and 60°

Answer/Step-by-step explanation:

Complementary angle is two angle that add up to 90 degree.

Complementary angle also put together form a right angle.

ex:

To determine the complement, subtract the given angle from 90. 90 - 43 = 47° The complement of 43° is 47°.

Mindy can a drive a total of 375 miles on a full tank of gas, which is 25 gallons. Based on this information, what is the constant of proportionality?

25

15

375

10

Answers

Answer:

15

Step-by-step explanation:

[tex]\frac{25}{375} = \frac{1}{x}[/tex]

Cross multiply to get 25x = 375

Divide each side by 25 to get x = 15

PLEASE HELP!!! WORTH 50 PTS
6.7 Problem 12
A given bacteria culture initially contains 2500 bacteria and doubles every half hour. The number of bacteria p at a given time t is given by the formula p(t)=2500ekt for some constant k. (You will need to find k to answer the following.)

(a) Find the size of the bacterial population after 20 minutes.

(b) Find the size of the bacterial population after 9 hours.

Answers

Answer:

I think it is 392=but am not sure

Based only on the information given in the diagram, which congruence
theorems or postulates could be given as reasons why triangle JKL triangle QRS?
Check all that apply.
A. LA
B. LL
C. SAS
D. HL
E SSS
F HA

Answers

Answer:SAS, HL, LL, SSS

Step-by-step explanation:

just did it

Angles of a triangle worksheet
I got most of it but still confused on the rest… anyone got answers ASAP!

Answers

Answer:

I wish a could help u,

Step-by-step explanation:

I dont know what is that:)

Hello.My question is......what are my chances of rolling a 4 when i throw a dice if i rollo it two times?

Answers

Answer:

Step-by-step explanation:

3

Answer:

1/6 because wanting to roll a four every time you roll a dice is going to be a 1.6 chance since there is only one 4

Step-by-step explanation:

6.4 + 3.2? I need it in simplist form

Answers

Answer:

9.6

Step-by-step explanation:

Answer:

9.6 in decimal form, 9 6/10 in a mixed fraction, 96/10 in an improper fraction.

Step-by-step explanation:

6.4 + 3.2, 6 plus 3 = 9

4+2 = 6

Four equations are graphed on the coordinate grid: which set of equations has (-2,5) as its solution?

Answers

The Answer is the graph C

Surface area of a triangular prism

Answers

Answer:

Triangular prisms have their own formula for finding surface area because they have two triangular faces opposite each other. The formula A=bh is used to find the area of the top and bases triangular faces, where A = area, b = base, and h = height.

Step-by-step explanation:

BRAINLIEST?

Maribel is taking advantage of the sale at Cassieś Cashew shoppe.she wants to figure out how much she will save on a purches of $34.Maribel´s percent ruler is shown below.Copy the ruler on your paper and help her figure out what 20% of $35 is.

Answers

An equation is an expression that shows the relationship between two or more variables and numbers.

Let x represent the money that Maribel would save on the sale.

Since she would save 20% on purchases, hence money saved on purchase of $35 is:

x = 20% of $35 = 0.2 * 35 = $7

Maribel saves $7 on the purchase of $35.

Find out more on equation at: https://brainly.com/question/2972832

PLS ANSWER QUICKLY What is the best approximation of the solution to the system to the nearest integer values? (7, 0) (0, 6) (7, 1) (1, 7)

Answers

Answer:

0 = 0 = 0 = 0 = 0 < 1 < 6 < 7

0 is equal to 0 is equal to 0 is equal to 0 is equal to 0 is less than 1 is less than 6 is less than 7

0/

1

= 0/

1

= 0/

1

= 0/

1

= 0/

1

< 1/

1

< 6/

1

< 7/

1

Step-by-step explanation:

Answer:

the correct answer is (1, 7)

Step-by-step explanation:

Anyone Please Help (for A Brainly )

Answers

Answer:

y < x + 1

Step-by-step explanation:

Put the answer in desmos graphing calculator

the answer is y ≤ x + 1

ok done. Thank to me :>

HELPPP.!! I don’t understand

Answers

False I think it is a solution
i think it’s false.

who can solve this equation and get the right answer
solve x-2y=12 if the domain is {-3,-1,0,2,5}

Answers

Answer:

x-2y=12

Solve for y

x-2y=12

Subtract x on both sides

-2y=-x + 12

Divide both sides by -2

y=\frac{1}{2}x - 6y=21x−6

the domain is {-3,-1,0,2,5}

Domain are the set of x values

Range are the set of y values

We are given with domain x, we need to find out y values using the equation y=\frac{1}{2}x - 6y=21x−6

when x=-3 , y=\frac{1}{2}(-3)-6=\frac{-15}{2}=-7.5y=21(−3)−6=2−15=−7.5

when x=-1 , y=\frac{1}{2}(-1)-6=\frac{-13}{2}=-6.5y=21(−1)−6=2−13=−6.5

when x=0 , y=\frac{1}{2}(0)-6=-6y=21(0)−6=−6

when x=2 , y=\frac{1}{2}(2)-6=-5y=21(2)−6=−5

when x=5 , y=\frac{1}{2}(5)-6=\frac{-7}{2}=-3.5y=21(5)−6=2−7=−3.5

Range is {-7.5, -6.5, -6 , -5, -3.5}

Step-by-step explanation:

solve the equation ? 1 equation with 2 variables ? that is not possible.

what you mean is probably find the range.

x - 2y = 12

-2y = -x + 12

2y = x - 12

y = (x - 12)/2 = (1/2)x - 6

x = -3

y = 1/2 × -3 - 6 = -1.5 - 6 = -7.5

x = -1

y = 1/2 × -1 - 6 = -0.5 - 6 = -6.5

x = 0

y = 1/2 × 0 - 6 = -6

x = 2

y = 1/2 × 2 - 6 = 1 - 6 = -5

x = 5

y = 1/2 × 5 - 6 = 2.5 - 6 = -3.5

so, the corresponding range of the function is

{-7.5, -6.5, -6, -5, -3.5}

Explain why a step in solving the equation 4n= -36 is to divide both sides by 4. Then solve the equation

Answers

The correct value of ''n'' in this equation will be -9

Step-by-step explanation:

In order to find the value of ''n'' in this equation of the first degree, just isolate ''n'', and divide the right side into the left side of the equation:

Resolution:

[tex]\large \sf 4n= -36[/tex]

[tex]\large \sf n= -36\div4[/tex]

[tex]\large \sf n= \dfrac{-36}{4}[/tex]

[tex]\boxed{\boxed{{\large \sf n=-9}}}[/tex]

So we can conclude that the value of ''n'' in this equation will be -9

geometry solve for X

Answers

okay so isosceles triangle by the look of it, which mean that’s two sides and two angles must be the same and if you make the two given equations equal to each other then you should get x=22

Jamya mixes 3 cups of soda with 5 cups of punch. How much does she mix with 18 cups of punch?

Answers

Answer:

Well we can make a proportion in this scenario

So 3 cups of soda to 5 cups of punch

And how much soda for 18 punch.

Well we can do this

make “x” the amount of soda

And then make a proportion

3/5 = x/ 18

Now solve

You can cross multiply

54=5x

x=10.8

10.8 soda

(a)Find the greatest common factor (GCF) of 16 and 6.
(b)Use the GCF to factor 16 +6.

Answers

Answer:

2 x (8 + 3)

Step-by-step explanation:

b) 16 + 6 = 2 x (8 + 3)

=> 22 = 2(11)

=> 22 = 22

Therefore, 2 x (8 + 3) is your answer.

Brax has $12.00 to spend at the gift shop. He wants to buy a book for $7.50 and a dinosaur for $3.75. What change will Brax have after he purchases these items?

Answers

so i think this is how you do it im sorry if it isn’t

you do 7.50+3.75 which gives you 11.25 and you subtract 12.00 which gives you 75 cents :)

I'm really confused and need help.​

Answers

Answer:

EC = 3

Step-by-step explanation:

What are the places in decimals called.

Answers

Answer: the tenths place

Step-by-step explanation:

Order these numbers from least to greatest.
104/25
4.104
4 1/10
4.74

Answers

I believe it would be 4 1/10 ,4.104, 104/25, 4.74

What is the inequality shown?
-2 -1 0 1 2 3 4 5 6 7 8

Answers

Answer:

- 2 ≤ x < 8

Step-by-step explanation:

The closed circle at x = - 2 means that x can equal - 2

The open circle at x = 8 means that x cannot equal 8

All value in between are possible values for x, then the inequality is

- 2 ≤ x < 8

help me i need help!!!!!!!!!

Answers

Answer:

y=88

Step-by-step explanation:

Angles in a triangle equal 180

45 + 47 = 92

180 - 92 = 88

Answer:

88

Step-by-step explanation:

The two other angles add up to 92. Because the angles of a triangle, 180-92=y. We subtract to get 88.

If you subtract a negative number from that same number you are taking a negative amount from the negative number you started with which means you are making it more positive. Subtracting a negative number is the same as adding a positive one. Such as (-5) - (-6) = 1.

Answers

Answer:

Step-by-step explanation:

If u got two negative number such as (-6)+(-7) your answer will be positive 13.

If u got one negative number and one positive number like (-10)-(5) the answer will be negative like -5

What number combination equals -125

Answers

This is the answer: 5-130=-125

Answer:

-25(5)

Step-by-step explanation:

-25 ×5 = -125

Jasmine is reading a book. She has finished 23 of the book and has 56 pages left to read. How many pages has she read

Answers

Answer:

She would have 33 more pages left.

Step-by-step explanation:

You would want to subtract 23 from 56.

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