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
laila [671]
3 years ago
9

What are the possible values of x in 8x^2+4x=-1

Mathematics
1 answer:
Vladimir79 [104]3 years ago
6 0

Answer:

x1=-0.25(+)(0.25i)

x2=-0.25(-)(0.25i)

Step-by-step explanation:

we have

8x^{2}+4x=-1

Factor the leading coefficient

8(x^{2}+0.5x)=-1

Complete the square. Remember to balance the equation by adding the same constants to each side.

8(x^{2}+0.5x+1/16)=-1+1/2

8(x^{2}+0.5x+1/16)=-1/2

(x^{2}+0.5x+1/16)=-1/16

Rewrite as perfect squares

(x+0.25)^{2}=-1/16

remember that

i=\sqrt{-1}

(x+0.25)=(+/-)(0.25i)

x=-0.25(+/-)(0.25i)

x1=-0.25(+)(0.25i)

x2=-0.25(-)(0.25i)

You might be interested in
Find the area of the irregular shape. Round to the nearest tenth.
svp [43]
Given: 
Irregular Shape: 
Semi-circle and rectangle:

Area of a rectangle = l * w
Area of a semi-circle = (π r²)/2

Area of rectangle = 8 cm * 5 cm = 40cm²
Area of a semi-circle = (3.14 (4²))/2 = (3.14*16)/2 = 50.24/2 = 25.12cm²
4² is taken from diameter of 8cm divided by 2 to get the radius.

Total area = 40 cm² + 25.12 cm² = 65.12 cm²
3 0
3 years ago
What is the order of the set A={-1,20,3,17,5}
laiz [17]

Hey!

Hope this helps...

~~~~~~~~~~~~~~~~~~~~~~~~~~~

I'm assuming your talking about least to greatest, OR greatest to least.  If so, that's what I'll do...


Least to Greatest: -1, 3, 5, 17, 20

Greatest to Least: 20, 17, 5, 3, -1

~~~~~~~~~~~~

Unfortunately I did not completely understand the question, for future reference please give AS MUCH detail as possible so that your fellow brainly members can help you ASAP...

And thanks for using Brainly!

3 0
3 years ago
Help me, please!!!!! CORRECT ANSWER GETS BRAINLIEST!!!!!!
katen-ka-za [31]
Hello,

Here is your answer:

The proper answer to your question is..... 200,000=4x-20

When your doing questions like these make sure you pay attention to the question.

Your answer is 200,000=4x-20

If you need anymore help feel free to ask me!

Hope this helps!

5 0
3 years ago
I need help what is 1/3x-3?​
lilavasa [31]

Answer:

\frac{1}{3}x-3=\frac{x}{3}-3

Step-by-step explanation:

\frac{1}{3}x-3\\\\\frac{1}{3}x = \frac{x}{3}  \\\\Find\:L.C.M.\\\\=\frac{x}{3}-3

8 0
3 years ago
480/X - 8 - 480/x = 3
Nataliya [291]

Answer:

i don't know its ans thank you

7 0
2 years ago
Read 2 more answers
Other questions:
  • Find the area of square of one of its side is (3x+4y)cm.If x=4 and y=1,find its actual area.​
    8·1 answer
  • Using proportional reasoning, about how many of 180 seventh grade students in school would like to snorkel
    9·1 answer
  • Given f(x) = -2x +12, find f(-3).​
    10·1 answer
  • Find the number that makes 4:12 equivalent to 28:__.
    8·2 answers
  • Need a little bit of help
    15·1 answer
  • At the same time of day, a man who is 75 inches tall casts a 50-inch shadow and his son casts a 22-inch shadow. What is the son'
    9·2 answers
  • I need this a.s.a.p please
    14·1 answer
  • Alright a real question I need help on
    8·1 answer
  • Who wants to tal/k I'm bor/ed​
    5·2 answers
  • A bike store marks up the wholesale cost of all bikes they sell by 30%. Calvin wants to buy a bike that has a price tag of 123.5
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!