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
natali 33 [55]
3 years ago
5

Which are the solutions of x2 = –5x + 8?

Mathematics
1 answer:
Luda [366]3 years ago
4 0

Answer:

  x = -2.5 ± √14.25

Step-by-step explanation:

Add 5x to prepare for "completing the square."

  x² +5x = 8

Add the square of half the x-coefficient:

  x² +5x + 2.5² = 8 + 2.5²

  (x +2.5)² = 14.25

Take the square root.

  x +2.5 = ±√14.25

Subtract 2.5.

  x = -2.5 ± √14.25 ≈ {-6.27492, 1.27592}

You might be interested in
A rectangle has an area of 72 in². The length and the width of the rectangle are changed by a scale factor of 3.5. What is the a
gogolik [260]
3.5 squared. 12.25 times more would be the answer.
8 0
3 years ago
Read 2 more answers
4) If a = 28 and b = 4, then a/b = ______
exis [7]

Answer:

7

Step-by-step explanation:

You divided both 28 and 4 and you will get 7 as your answer.

7 0
3 years ago
What is the slope of the line that passes through the points (-2, 3)(−2,3) and (-14, -5) ?(−14,−5)? Write your answer in simples
NNADVOKAT [17]
I don't know the answer I'm just answering some thing so that Brinley will let me ask a question. Hope this helps LOL
7 0
3 years ago
Solve 3(x-3) = 0???????
kenny6666 [7]
Using distributive property, we get:

3x-9=0
3x=9
x=3

So, x=3. Now that was easy, huh? :)
5 0
3 years ago
Read 2 more answers
Maria spend 5 hours studying and earned a 90 on her exam. If you want to score a 81, how much time do you need to spend studying
Oliga [24]

Answer:

4hrs 30 mins

Step-by-step explanation:

5hrs-90

x-81

cross multiplying gives us

405-90x then dividing through made x=4.5 which is = 4hrs 30mins

7 0
3 years ago
Other questions:
  • The boundary of the lawn in front of a building is represented by the parabola . The parabola is represented on the coordinate p
    6·1 answer
  • For the functions f(x)=6x2+5x−14 and g(x)=x+2, find (fg)(x) and (fg)(4).
    7·2 answers
  • The following dot plot shows the number of books each student checked out from the library last month. Each dot represents a dif
    11·2 answers
  • Change this number from standard notation to scientific notation. 22.98504
    7·1 answer
  • 5.732-4.98 i need help im in 6th grade and i don't know if its 52.34 or 0.752
    9·2 answers
  • solve using a system of equations. a pharmacist wants to mix two solutions to obtain 350 cc of a solution that has a 14% concent
    7·1 answer
  • Find the slope of the line through the given points.<br> (-2,7) and (2,-5)
    14·1 answer
  • Pleaseeeeeeeeeeeeee i need the answer
    12·1 answer
  • If u have 2 penises and u ate 1 how many you got left???
    12·1 answer
  • Ophira’s insurance company has notified her that her premiums will increase due to a poor insurance score and a recent claim she
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!