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
Lisa [10]
3 years ago
12

How to solve 2x^2 - 4x = 3

Mathematics
1 answer:
zhenek [66]3 years ago
6 0

Answer:

1 ± i(1/2)√2

Step-by-step explanation:

Write this quadratic in standard form:  subtract 3 from both sides.  This results in 2x^2 - 4x - 3 = 0.  Let's apply the quadratic formula.  The coefficients of the x terms are 2, -4 and -3, so the discriminant is (-4)^2 - 4(2)(-3), or 16 - 24 = -8.

Following the format of the quadratic formula, we get

     -(-4) ±i2√8       4 ±i2√2        

x = ----------------- = --------------- =  1 ± i(1/2)√2

               4                    4

You might be interested in
Suppose ABC added a new point, D. If the coordinates of D were (5, 2), what would be the coordinates of D' have to be if it foll
atroni [7]

Answer:

C the coordinates are just fliped since It was flipped on the y- axis

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
A square is ______ a rectangle..
SVEN [57.7K]
Every square is always rectangle because it is a quadrilateral with all four angles, right angles
3 0
4 years ago
20 points for help please! Thanks! I think it's B, am I right or wrong?
Illusion [34]

Answer:

any hirap nmn po

Step-by-step explanation:

tingnan ko po sa photo math ang mamaya kopo sasabihin

4 0
3 years ago
Over the interval [0, 2π), what are the solutions to cos(2x) = cos(x)? Check all that apply.
valentinak56 [21]

Answer:

Step-by-step explanation:

given the expression;

cos(2x) = cos(x)

According to trig identity;

cos(2x) = cos(x+x)

cos(2x) = cos x cos x - sinx sinx

cos(2x) = cos²(x)-sin²(x)

cos(2x) = cos²(x)-(1-cos²x)

cos(2x) = cos²(x)+cos²x-1

cos(2x) = 2cos²(x)-1

2cos²(x)-1 = cos(x)

let P = cosx

2P²-1 = P

2P²-P-1 = 0

Factorize;

2P²-2P+P-1 = 0

2P(P-1)+1(P-1) = 0

2P - 1 = 0 and P-1 = 0

P = 1/2 and 1

cosx = 1/2 and cos x = 1

x = arccos 1/2

x = π/3

Also;

x = arccos1

x = 0

Hence the value of x are 0 and  π/3

Also the angle = π+ π/3 = 4π/3

The angles are 0, π/3 and 4π/3

4 0
3 years ago
Read 2 more answers
I really need some help!
jarptica [38.1K]

Answer:

84 in.

Step-by-step explanation:

6*6=36/2=18

6*11=66

18+66=84

7 0
3 years ago
Other questions:
  • The monthly cost (in dollars) of a long-distance phone plan is a linear function of the total calling time (in minutes). The mon
    14·1 answer
  • Which value of x is in the solution set of the following inequality <br> -x+8&gt;6
    10·1 answer
  • the resendez family pays a monthy base charge for their electricity plus a charge for each kilowatt-hour used. In april, their e
    13·1 answer
  • ALLLL WORK PLEASEEEEE<br><br> 2x=-14
    7·2 answers
  • Disneyland sells adult passes for $60 and youth passes for $30. In one day, 360 passes were sold for a total of $14,520. How man
    14·1 answer
  • Mark has a collection of 1,400 baseball cards. Of these baseball cards, 40% are dated before 1980, 25% are dated from 1980 to 20
    13·2 answers
  • Someone help me with this if you can
    15·1 answer
  • Which is the graph of g(x) = (x - 5)^2 + 2?
    14·1 answer
  • In a three digit number, the tens digit is thrice the unit digit and hundred’s digit is
    15·1 answer
  • Which point is a solution to the following system of inequalities?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!