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
forsale [732]
3 years ago
6

Solve 3x^2 + 6x+15=0

Mathematics
1 answer:
Elden [556K]3 years ago
6 0

Answer:

The solution of given equation is ( - 1 + 2 i ) , ( - 1 - 2 i )

Step-by-step explanation:

Given equation as :

3 x² + 6 x +15 = 0

The value of x fro the quadratic equation a x² + b x + c = 0 is obtained as

x = \frac{-b\pm \sqrt{b^{2}-4ac}}{2a}

So , from given eq , the value of x is now obtain as

x = \frac{-b\pm \sqrt{b^{2}-4\times a\times c}}{2\times a}

Or, x =  \frac{-6\pm \sqrt{6^{2}-4\times 3\times 15}}{2\times 3}

Or, x = \frac{\sqrt{-144} }{6}

∴   x = ( - 1 + 2 i ) , ( - 1 - 2 i )

Hence The solution of given equation is ( - 1 + 2 i ) , ( - 1 - 2 i )  Answer

You might be interested in
The ice skating rink rents 25 pairs of skates each hour. Write an expression that represents the pairs of skates rented in h hou
Nookie1986 [14]

175 pairs of skates are rented for 7 hours.

Step-by-step explanation:

Given,

Pairs of skated rented each hour = 25

Let,

Number of hours = h

Total pairs rented = T

T = Pairs rented each hour * number of hours

T = 25h

Evaluate the expression for 7 hours.

h = 7

T=25(7)\\T=175

175 pairs of skates are rented for 7 hours.

Keywords: multiplication, linear expression

Learn more about multiplication at:

  • brainly.com/question/10541435
  • brainly.com/question/10666510

#LearnwithBrainly

3 0
3 years ago
I need urgent help!!! What is the volume of the figure?
Allisa [31]

Answer:

3190 ft

Step-by-step explanation:

add 22 plus 7 to get the entire length then multiply 29 by 11 the multiply that by ten hope this helps

3 0
3 years ago
I need help on this one plizz
andrew11 [14]
I'm probably wrong but here you go!

4 0
3 years ago
A submarine is situated 400 feet below sea level. If it drops another 250 feet below sea level, what is the new position?
natka813 [3]

Answer:

-650ft

Step-by-step explanation:

I took a test with a question like that

8 0
3 years ago
Hiii can someone pls pls pls help asap
AlekseyPX

Answer:

k = 3.5

Step-by-step explanation:

You need to divide all the numbers.

21/6 = 3.5

24.5/7 = 3.5

28/8 = 3.5

31.5/9 = 3.5

So, the answer is 3.5.

8 0
2 years ago
Other questions:
  • Evaluate the expression. 24÷(−4)+(−2)⋅(−5)
    6·1 answer
  • What are the lengths?
    5·1 answer
  • Jasmine earns $1200 per month as a base salary, plus 3% of her total sales. Write a linear model of her monthly earnings. Then u
    8·2 answers
  • Find the area of triangle ABC. Give your answer to 1 decimal place. Sine rule.
    14·1 answer
  • on saturday keisha ran 3.218 kilometers.On Sunday she ran 2.41 kilometers. How much further did she ran on saturday than on sund
    5·1 answer
  • I need an answer ASAP
    7·2 answers
  • What is the name of the two types of graph relationships?
    11·1 answer
  • Find the quotient.<br><br> 35.4 ÷ 0.59
    7·2 answers
  • Degree and Radian Measures
    14·1 answer
  • 10. Consider the diagram below.<br> A. solve for x<br> B. Solve for y
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!