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
Nonamiya [84]
3 years ago
10

What number must you add to complete the square x^2-16=23

Mathematics
2 answers:
Yanka [14]3 years ago
6 0

Answer:

6,24

Step-by-step explanation:

6,24^2-16= 22,9376 -> 23

Kobotan [32]3 years ago
4 0

For this case we must complete squares:

x ^ 2-16x = 23

We add the square of half the coefficient of the term "x",

(\frac {b} {2a}) ^ 2 on both sides of the equation:

x ^ 2-16x + (\frac {-16} {2 (1)}) ^ 2 = 23 + (\frac {-16} {2 (1)}) ^ 2\\x ^ 2-16x + (- 8) ^ 2 = 23 + 64

According to the perfect square trinomial we have:

(a + b) ^ 2 = a ^2 + 2ab + b ^ 2

Rewriting the expression we have:

a = x\\b = -8\\(x-8) ^ 2 = 23 + 64\\(x-8) ^ 2 = 87

ANswer:

(x-8) ^ 2 = 87

You might be interested in
A square has a side length of 5x + 3. Which expression represents theperimeter of the square
4vir4ik [10]

Answer:

um

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Arrange the following polynomial into descending order for x, then interpret the degree of the 2nd term.
igor_vitrenko [27]
For the answer to the question above,  the power of "y" doesn't influence descending order for x even if it is higher than power of x.

Unordered polynomial is 
7x3y3 + 4 - 11x5y2 - 3x2y

Polynomial in descending order  looks like this
-11x5y2 + 7x3y3 - 3x2y + 4

Degree of the second term is 5 ( because of x5 ) 
3 0
2 years ago
Read 2 more answers
(its part b to question 9 ) If there are 15 students who don't wear glasses how many students are there in class?​ PLZ HELP WILL
hichkok12 [17]

Answer:

there are 25 students in the class and 15 who wear glasses.

5 0
2 years ago
Read 2 more answers
If 4 raffle tickets is 6 dollars how much is 1 raffle ticket
sertanlavr [38]
4/6 = 1/x cross multiple so x= 1.5 dollars
8 0
3 years ago
Solve the system using a matrix.
zheka24 [161]

Answer:

using Gaussian elimination method of matrix

4 0
3 years ago
Other questions:
  • How much gas does an average car hold?
    13·1 answer
  • Premises: All flowers are beautiful. All roses are flowers. Conclusion: All roses are beautiful
    13·1 answer
  • The endpoints of a diameter of a circle are A(1,2) and (7.10). Find the area of the circle in terms of pi
    8·1 answer
  • What is the domain of validity for csc theta =
    14·1 answer
  • An expression is written. 3x2 + 5xy+ y? If x = 4 and y = 2, what is the value of the expression ?​
    6·1 answer
  • Nick rolls a fair dice 126 times.
    9·2 answers
  • The vertices of a rectangle are located at (1, 2), (5,0), (2, -6), and (-2,-4). What is the area of the rectangle?
    15·1 answer
  • Why doesn't anybody help me!!! Please answer this question!!
    8·1 answer
  • Find the zeros for each function
    10·1 answer
  • Amanda is the owner of a small chain of dental offices. She sent out the yearly satisfaction survey to 600 randomly selected pat
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!