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
Oksanka [162]
3 years ago
10

How do you solve an equation by completing the square? Example:

D-8" id="TexFormula1" title=" x^{2}+6x=-8" alt=" x^{2}+6x=-8" align="absmiddle" class="latex-formula">
Mathematics
2 answers:
Serga [27]3 years ago
7 0
X²+6x+8=0
x²+2*3x+9-1=0
(x+3)²-1=0
(x+3)²-1²=0
(x+3-1)(x+3+1)=0
(x+2)(x+4)=0
x₁=-2
x₂=-4
Answer: x₁=-2,  x₂=-4
bixtya [17]3 years ago
7 0
x^2+6x=-8\\
x^2+6x+9=1\\
(x+3)^2=1\\
x+3=1 \vee x+3=-1\\
x=-2 \vee x=-4
You might be interested in
If the volume of a sphere is 36 pi cubic units, what is the radius?
Radda [10]

Answer:

3 units

Step-by-step explanation:

Hello

The sphere volume is:

(4/3)*Pi*r^3

then

36 = (4/3)*Pi*r^3

36/[(4/3)*Pi] = r^3

8,5 = r^3

r = 3

Best regards

5 0
3 years ago
Suppose y = 2x + 1 , where x and y are functions of t. (a) if dx/dt = 6, find dy/dt when x = 4. dy dt = (b) if dy/dt = 2, find d
evablogger [386]

y=2x+1\\\\\dfrac{dy}{dt}=2\dfrac{dx}{dt}

(a) For dx/dt=6, dy/dt = 2·6 = 12

(b) For dy/dt=2, 2 = 2·dx/dt ⇒ dx/dt = 1

_____

The value of x is irrelevant for this question.

=====

If your function is 2^x +1 or 2^(x +1), it needs to be written as such. The answer above applies to the function given.

7 0
3 years ago
Need help with what I did they all add up to 4 which is what the question asks for but it says that it not right
ludmilkaskok [199]

Answer: Try putting the positive number and then the negative number after the and like the example.

Step-by-step explanation:

Your answers are right, it could be a glitch.

6 0
4 years ago
Shelly is going shopping at the mall to buy 3 pairs of shoes. She has a coupon for $2 off perpair of shoe after buying the first
aleksklad [387]

Answer:

$42

Step-by-step explanation:

If you want to check, simply take the values I calculated, multiply them by 3 and subtract them by 2 for the second and third pair, they will add up to the values that Shelly is willing to purchase, excluding tax.

8 0
3 years ago
PLEASE I NEED HELP !!!!!!
kogti [31]
I’m pretty sure it’s B. -3/8x - 1/4 :).
5 0
3 years ago
Other questions:
  • (2 x + 1):15=(x-1):7​
    14·2 answers
  • What is the solution of the system? use substitution. 5x - y =3 6x - y=8
    10·1 answer
  • Help me out pleasee!!!!!!
    7·2 answers
  • The average attendance at the first four meetings of the drama club was 75% at the next six meetings the average attendance was
    7·1 answer
  • X+16=3 equation help please
    7·2 answers
  • How to write a mixed number in simplest form.
    6·1 answer
  • At Miramar college, 71% of students will graduate. Of students who will graduate, 53% are female. At the college 49% are male an
    6·1 answer
  • Solve the following equation for a. Be sure to take into account whether a letter is
    10·1 answer
  • Which of the following is equal to [(x^2y^3)^-2/(x^6y^3z)^2]^-3
    13·2 answers
  • ?, -3-5,7,11 find the sequence​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!