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
svlad2 [7]
3 years ago
7

Using the quadratic formula to solve x2 = 5 - X, what are the values of X?

Mathematics
1 answer:
sdas [7]3 years ago
3 0

Answer:

The answer is

<h3>x =  \frac{ - 1 +  \sqrt{21} }{2}  \:  \:  \: or \:  \:  \: x =  \frac{ - 1 -  \sqrt{21} }{2}</h3>

Step-by-step explanation:

x² + x - 5 = 0

Using the quadratic formula

That's

<h3>x =  \frac{  - b\pm \sqrt{ {b}^{2} - 4ac } }{2a}</h3>

From the question

a = 1 , b = 1 , c = - 5

Substitute the values into the above formula and solve

We have

<h3>x =  \frac{ - 1\pm \sqrt{ {1}^{2} - 4(1)( - 5) } }{2(1)}  \\ x =  \frac{ - 1\pm \sqrt{1  + 20 } }{2}  \\ x =   \frac{ - 1\pm \sqrt{21} }{2}</h3>

We have the final answer as

<h3>x =  \frac{ - 1 +  \sqrt{21} }{2}  \:  \:  \: or \:  \:  \: x =  \frac{ - 1 -  \sqrt{21} }{2}</h3>

Hope this helps you

You might be interested in
An event has a probability of 2/7. How would you best describe the likelihood of this event? (Hint: Change it to a decimal)
AVprozaik [17]

Answer:

Less Likely

Step-by-step explanation:

A 2/7 probability means that it will happen less than half the time.

The eliminates equally likely, more likely, and certain as those are 50% or greater.

The probability is also greater than 0%, so it's not "impossible"

Therefore, the answer must be B, Less Likely.

It happens less than half the time, but can at times happen.

Hope this helps!

4 0
2 years ago
Read 2 more answers
Micah is planning to buy a soccer ball for $17.95. The sales tax rate is 8.25%. He wants to be sure he has enough money. How muc
hoa [83]
The amount of tax on $17.95 = $17.95 * 0.0825 = $1.48
add this to the 17.95 to get ur answer
4 0
3 years ago
One number is 5 times another number. The product of the two numbers is 245. Find the two numbers
ra1l [238]
Y= 5x 

x+y= 245

X+ (5X) = 245

6X = 245 

divide both sides by six and their is your answer :)

good luck! and message me if you have any more questions and you want to learn and not cheat you way out of it
4 0
3 years ago
Read 2 more answers
Wha is 3/8×5/6 you will need a paper.
icang [17]
3/8 x 5/6 = 15/48 = 5/16
4 0
2 years ago
Read 2 more answers
Three times the sum of a number and seven is 23 less than five times the number find the number wrong your answer to the nearest
mote1985 [20]

so you have your two equations 3x+7=5x-23 and solve for x which is your "number" leaving the answer to be <u>x=15</u>

4 0
3 years ago
Other questions:
  • this squared based pyramid is cut horizontally at a height of 15cm to leave this frustum base area=10cm
    8·1 answer
  • Which of the following is the best example of a characteristic of an experiment?
    10·1 answer
  • A farmer finds that if she plants 60 trees per acre, each tree will yield 45 bushels of fruit. she estimates that for each addit
    6·1 answer
  • Find an equation for this line.
    10·1 answer
  • The most inner parenthetical term confuses me... <br><br>5+2 [10 (5•3-10)-30] =
    8·1 answer
  • In Alan"s class there are 12 boys and 13 girls what is the ratio of boys and girls
    6·1 answer
  • <img src="https://tex.z-dn.net/?f=a%20%5C%3A%20woman%20%5C%3A%20bought%20%5C%3A%20a%20%5C%3A%20bag%20%5C%3A%20of%20%5C%3A%20rice
    11·1 answer
  • Use the distributive property to produce an equivalent expression. -8(3z – 7)​ help asap
    15·1 answer
  • The width of a rectangle is 4y-2.5 feet and the length is 2.5y+10 feet. Find the perimeter of the rectangle.
    11·2 answers
  • What is the equation of a line parallel to y=-4x-7 that passes through 2,29
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!