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
Tems11 [23]
3 years ago
12

If using the method of completing the square to solve the quadratic equation x^2+15x+21=0, which number would have to be added t

o "complete the square"?
Mathematics
2 answers:
Anit [1.1K]3 years ago
8 0

Step-by-step explanation:

the answer is in the above image

Anna35 [415]3 years ago
3 0

Answer:

my answer is 225/5 sorry comments for wrong

You might be interested in
What is the factored form of x2 – x – 2? (x – 2)(x 1) (x 2)(x 1) (x – 2)(x – 1) (x 2)(x – 1)
Alexxx [7]

A quadratic equation is an equation whose leading coefficient is of the second degree. The factored form of the quadratic equation x²-x-2 is (x+1)(x-2).

<h3>What is a quadratic equation?</h3>

A quadratic equation is an equation whose leading coefficient is of second degree also the equation has only one unknown while it has 3 unknown numbers.

It is written in the form of ax²+bx+c.

The factored form of the quadratic equation can be done in the following manner,

x^2-x-2\\\\= x^2-2x+x-2\\\\=x(x-2)+(x-2)\\\\=(x+1)(x-2)

Thus, the factored form of the quadratic equation x²-x-2 is (x+1)(x-2).

Learn more about Quadratic Equations:

brainly.com/question/2263981

8 0
2 years ago
Please help solving this ! Which net represents the figure?
Sergeeva-Olga [200]

Answer:

  upper right

Step-by-step explanation:

The net for a figure is a representation of all of the figure's faces. The polygons in the net are joined on an edge corresponding to a common edge between the faces they represent.

The given figure is a rectangular prism. Its faces are only rectangles. All nets that have triangles in the net can be eliminated from consideration.

The appropriate choice is the one attached.

6 0
2 years ago
What is the spread of 5,5,5,5,5
stepan [7]

Answer:25

Step-by-step explanation:

8 0
3 years ago
For every 30 letters that Maria sent in a month, she received 40 letters. What is the ratio in simplest form of the number of le
Sonbull [250]
I believe the correct answer is 3:4 
i might be incorrect, if i am i am very sorry. I hope this helps!
3 0
3 years ago
BRAINLIEST IF RIGHT<br> 16 - 2t = 5t + 9
REY [17]

Answer:

t = 1

Step-by-step explanation:

16 - 2t = 5t + 9

   +2t     +2t

-------------------------

16 = 7t + 9

-9        -9

--------------------------

7 = 7t

/7   /7

--------------------------

1 = t

3 0
3 years ago
Read 2 more answers
Other questions:
  • A cylindrical storage container has a radius of 8 inches and a height of 18 inches. What is the volume of the storage container?
    8·1 answer
  • Factor.<br> 5x^2+10x-15<br> Someone answer fast <br> Hurry pls
    6·1 answer
  • Hung had to be at school by 7:10 p.M Takes 20 minutes for Hung to shower and get dressed and 15 minutes to eat breakfast. If Hun
    7·1 answer
  • The first gardener can finish the job in 6 hours, and the second gardener can do the same job in 7 hours. How long it will take
    9·1 answer
  • The equation y = -3x - 4 and another equation have a solution of (3,-13). Which of the following could be the second equation?
    10·1 answer
  • Examples of whole numbers
    7·2 answers
  • The sea surface range -2°c to 31°c find the difference between the maximum and minimum temperature
    11·1 answer
  • Which expression is equivalent to 5(2+7)?<br> A. 2(5+7)<br> B. 2+7(5)<br> C. 5(2)+7<br> D. 5(2)+5(7)
    8·2 answers
  • 1 point
    10·2 answers
  • Eli claims that the product of 6 superscript 5 and 5 superscript negative 3 is 6 squared. which explains whether eli is correct?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!