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
zlopas [31]
3 years ago
11

Solve -3x^2 - 4x - 4 = 0

Mathematics
2 answers:
STALIN [3.7K]3 years ago
5 0

Answer:

x1=\frac{-2(+)2i\sqrt{2}} {3}

x2=\frac{-2(-)2i\sqrt{2}} {3}

Step-by-step explanation:

we have

-3x^{2} -4x-4=0

Rewrite (Multiply by -1 both sides)

3x^{2}+4x+4=0

The formula to solve a quadratic equation of the form ax^{2} +bx+c=0 is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

3x^{2}+4x+4=0

so

a=3\\b=4\\c=4

substitute

x=\frac{-4(+/-)\sqrt{4^{2}-4(3)(4)}} {2(3)}


x=\frac{-4(+/-)\sqrt{-32}} {6}

remember that

i=\sqrt{-1}

x=\frac{-4(+/-)4i\sqrt{2}} {6}

Simplify

x=\frac{-2(+/-)2i\sqrt{2}} {3}

x1=\frac{-2(+)2i\sqrt{2}} {3}

x2=\frac{-2(-)2i\sqrt{2}} {3}



shepuryov [24]3 years ago
3 0

-3x^2 - 4x - 4 = 0\\\\\Delta=(-4)^2-4\cdot(-3)\cdot(-4)=16-48=-32

\Delta therefore there are no solutions in real numbers.

You might be interested in
PLEASE HELP
igomit [66]

Answer:

20 hours.

Step-by-step explanation.

The total distance traveled was 400 miles. Then I divided 400 by 20. I got 20.

5 0
3 years ago
What is −2/0÷4/5? −2/5 −1/6 −1/16 −1/25<br><br><br> / means a fraction line
STALIN [3.7K]
It’s not possible if that’s kne of the options
7 0
3 years ago
Read 2 more answers
Jesse worked forty hours this past week assuming he makes $12 an hour how much was withheld from his paycheck by his employer fo
Alecsey [184]
He made 12*40=480 dollars in total. 0.0765*480=36.72 dollars were withheld.
6 0
3 years ago
Read 2 more answers
2x = 4y + 8, x - 2y = 4
Evgen [1.6K]

Answer: x = 8, y = 2, coordinates (8,2)

Step-by-step explanation:

2x = 4y + 8 (divide by 2 to get value of x)

x = 2y + 4

(now substitute x into the second equation to find value of y)

2y + 4 - 2y = 4

2y - 2y = 4 - 4 (divide by 2 to get value of y)

y - y = 2 - 2

y = 2

Now plug in value of "y" to get value of "x".

x - 2(2) = 4

x - 4 = 4

x = 8

Coordinates (8,2)

3 0
2 years ago
PLEASE HELP !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Bond [772]

Answer:

R = \frac {3ST}{2S + T}

Step-by-step explanation:

Given the equation;

\frac {3}{R} - \frac {1}{S} = \frac {2}{T}

Rearranging the equation, we have;

\frac {3}{R} = \frac {2}{T} + \frac {1}{S}

Lowest common multiple (LCM) of S and T is ST.

\frac {3}{R} = \frac {2S + T}{ST}

Cross-multiplying, we have;

3ST = R(2S + T)

Making R, the subject of formula;

R = \frac {3ST}{2S + T}

8 0
3 years ago
Other questions:
  • What is the factor of this problem? <br> ~plz help I cannot get this wrong !
    13·1 answer
  • The arithmetic mean of two numbers is 18 and the geometric mean is 16. find the sum of squares of the numbers
    8·1 answer
  • Using squares cube roots and reciprocals tables, solve: 2/∛21.36
    10·1 answer
  • A cylinder has a volume 1200 cubic inches and radius 5 inches. What is the height of the cone to the nearest tenth inch
    13·1 answer
  • Suppose that you take 120 mg of an antibiotic every 4 hr. The​ half-life of the drug is 4 hr​ (the time it takes for half of the
    15·1 answer
  • Find the sum and product of the roots.
    13·2 answers
  • Identify the sample space of the probability experiment: Answering a true or false question.
    9·1 answer
  • Nylah buys a pack of 20 markers for $6.00. How much does a pack of 30<br> markers cost? *
    14·1 answer
  • Plis help! Will give brainliest! 5th grade math!
    12·1 answer
  • I can’t figure this out. Help!
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!