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
elixir [45]
3 years ago
10

Solve 3x^2=-12-6x by completing the square​

Mathematics
1 answer:
Lelu [443]3 years ago
3 0

Answer:

x = - 1 ± i \sqrt{3}

Step-by-step explanation:

Given

3x² = - 12 - 6x ( add 6x to both sides )

3x² + 6x = - 12 ( divide through by 3 )

x² + 2x = - 4

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(1)x + 1 = - 4 + 1

(x + 1)² = - 3 ( take the square root of both sides )

x + 1 = ± \sqrt{-3} = ± i \sqrt{3} ( subtract 1 from both sides )

x = - 1 ± i \sqrt{3}

You might be interested in
Is there a value c, for 0
Sedaia [141]

Answer:

 

Step-by-step explanation:

   

4 0
3 years ago
A number r is more than 0 or less than or equal to ‐8
Butoxors [25]

Answer

-8 \geq r > 0

Step-by-step explanation:

you know that r is less than or equal to -8, so you write that, and then you know that r is also greater than 0, so then you add that to it, and then you have the answer. r will be in the middle because it is the range of what are can be.

7 0
3 years ago
Why is it important to check all solutions to radical equations?
aleksklad [387]
Hello.

The solutions found to radical equations are not necessarily viable. They sometimes result in inequalities, and have to be checked.

Hope I helped.
4 0
3 years ago
Read 2 more answers
Helppppp.. picture attached
tatyana61 [14]
n^2+n\\\\check:\\\\a_1=1^2+1=2\\a_2=2^2+2=6\\a_3=3^2+3=12\\a_4=4^2+4=20
6 0
3 years ago
The LCD for the fractions 1/3 , 3/4 ,5/32 , and 8/9 is
TiliK225 [7]
Your LCD is 288.

Thank You,
  Helpingothers
7 0
3 years ago
Other questions:
  • 0.06%*26,500=1,590<br> 1590+725+50=2365<br> 26,500+2,365=28,865
    14·1 answer
  • 32.determine the rate of change of the graph
    8·2 answers
  • X+y=2 2x^2+xy+1 Plz answer
    15·1 answer
  • Find the value of this expression if x= 3 x^2+4/x
    11·1 answer
  • There are 17 students participating in a spelling bee. how many ways can the students who go first and second be chosen?
    15·1 answer
  • 4 ounces of instant coffee makes 60 cups how many ounces are needed to make 25 cups
    10·2 answers
  • I have no idea how to do these
    7·1 answer
  • Find the X-intercepts :<br> 0=2(x+2)^2-5
    6·1 answer
  • What is the slope of the line that passes through the points (-4, -4)(−4,−4) and (-4, -9) ?(−4,−9)? Write your answer in simples
    13·1 answer
  • Question
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!