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
lubasha [3.4K]
3 years ago
13

When solving for x, what is x squared plus 15 equals -8x

Mathematics
1 answer:
VLD [36.1K]3 years ago
5 0

Answer:

x = - 5, x = - 3

Step-by-step explanation:

Given

x² + 15 = - 8x ( add 8x to both sides )

x² + 8x + 15 = 0 ← in standard form

Consider the factors of the constant term (+ 15) which sum to give the coefficient of the x- term (+ 8)

The factors are 5 and 3, since

5 × 3 = 15 and 5 + 3= 8, thus

(x + 5)(x + 3) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 5 = 0 ⇒ x = - 5

x + 3 = 0 ⇒ x = - 3

You might be interested in
Please!!! find the value of x (question 7)
ludmilkaskok [199]

Answer:

I think it's 25

Step-by-step explanation:

Because the image next to it has the angles of 90, 65

90+65 = 155

180- 155 =25

3 0
3 years ago
Read 2 more answers
The greenland ice sheet contains 2,850,000 cubic kilometers of ice. it is melting at a rate of .006% per year. how many cubic ki
emmainna [20.7K]
Answer:  171 km³ per year. 
_________________________________
{ <u><em>Note</em></u>:  This is the answer for which you seek.  However, this is the "amount" lost in the first year.  For the second year, you would calculate 0.006% of
  "171 km³ " to find out how the amount of ice lost in the second year.}.
__________________________________________________________
Explanation:
__________________________________________________________

0.006% = 0.006/ 100 = 0.00006 ;

0.00006 * 2,850,000 km³ = 171 km³  per year.
______________________________________________
5 0
3 years ago
If f varies inversely as g, find f when g= -6.<br> F= 4 when g= -6<br> F=
Naddik [55]

Step-by-step explanation:

  • f=g

f=1/g

4=1/-6

=-24

find f

f=1/-6

4 0
3 years ago
Choose the equation that could be used to find three consecutive integers whose sum is 36
lisov135 [29]
Only C.) is logical, because in reality that is
(n+0)+(n+1)+(n+2)=36
And 0, 1, 2 are consecutive numbers.
8 0
3 years ago
Simplify each expression by combining like terms.
mash [69]

The simplification of – 65x + 4.2y + 65x – 2.2y + 5.4 + y – 3y is 5.4

<u>Solution:</u>

Given, expression is – 65x + 4.2y + 65x – 2.2y + 5.4 + y – 3y

We have to solve the above given expression by combining the like terms.

Then, – 65x + 4.2y + 65x – 2.2y + 5.4 + y – 3y

Combining the like terms in above expression we get,

⇒ ( - 65x + 65x ) + ( 4.2y – 2.2y + y – 3y ) + 5.4  

⇒ ( 0 ) + ( 2.0y + ( - 2y ) ) + 5.4

⇒ 0 + (2y – 2y) + 5.4

⇒ 0 + 5.4  = 5.4

Hence, the value of the given expression is 5.4

8 0
4 years ago
Other questions:
  • Does anyone know the answer to this question , ill love you forever it you know the correct answer
    15·2 answers
  • If the sales tax in your city is 4.4%, and an item costs
    10·1 answer
  • He measured the diameter to be 10.06 feet. What is the approximate area of the center circle on the basketball court?
    15·1 answer
  • The mean absolute deviation is 1.74 inches for the badminton team and 3.02 inches for the basketball team. Which of the followin
    5·1 answer
  • Does anybody have a proper answer?
    13·1 answer
  • Solve the equation 2x^2+8x-1=0 by completing the square. Give your answer to 2 decimal places 4 marks
    12·1 answer
  • The area of a circle is ​ square centimeters. What is the radius?
    10·1 answer
  • Does anyone know how to answer this question? Please write your working calculation as well if you do know the answer. Thanks so
    15·1 answer
  • Can someone please explain how to do this? 50 points
    10·1 answer
  • The answer to this question asap please
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!