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
sp2606 [1]
3 years ago
12

Using the quadratic formula to solve 2x2 = 4x – 7, what are the values of x? 2 plus-or-minus StartRoot 10 EndRoot i 1 plus-or-mi

nus StartRoot 10 EndRoot i StartFraction 2 plus-or-minus StartRoot 10 EndRoot i Over 2 EndFraction 1 plus-or-minus StartRoot 5 EndRoot i

Mathematics
2 answers:
grigory [225]3 years ago
8 0

Answer:

C. (Check Attached image)

Step-by-step explanation:

I'm too lasy to explain but to summarize,

- add -2x^2 to both sides

- then plug the numbers into the right places

(Google quadratic formula if you don't remember)

- solve

This post was made by the quadratic Formula gang because factoring is lame.

ioda3 years ago
7 0

Answer:

x = 1 +/- \frac{i\sqrt{10} }{2}

Step-by-step explanation:

The equation given is:

2x^2 = 4x - 7\\\\2x^2 - 4x + 7 = 0

Using quadratic formula:

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

From the question:

a = 2, b = -4, c = 7

Therefore:

x = \frac{4 +/- \sqrt{(-4)^2 - 4 * 2 * 7} }{2 * 2}\\\\x = \frac{4 +/- \sqrt{(16 - 56)} }{4}\\\\x = \frac{4 +/- \sqrt{-40} }{4}\\

=> x = 1 +/- \frac{i\sqrt{10} }{2}

You might be interested in
Time left: 0:48:24<br>Question 11 of 50<br>What are the roots of the quadratic equation<br>x2+3x+2?​
alexgriva [62]

Answer:

-1 & -2

Step-by-step explanation:

x²+3x+2

x²+2x+x+2

(x²+2x)+(x+2)

x(x+2)+1(x+2)

(x+1)(x+2)

6 0
3 years ago
Read 2 more answers
Help please thanks in advance
DochEvi [55]
What does the black say, the options
3 0
3 years ago
suppose that the local sales tax rate is 6.25% and youpurchased a used carr for 16,800. what is the car's total cost
Gwar [14]

Total= Car Cost + (Car Cost * Tax %)


Total= $16,800 + ($16,800 * 6.25%)

convert % to decimal form; divide % by 100


Total= $16,800 + ($16,800 * 0.0625)

multiply inside parentheses


Total= $16,800 + $1,050


Total= $17,850



ANSWER: The total cost for the used car with tax is $17,850.


Hope this helps! :)


8 0
3 years ago
HELP!!!!!!!!
shtirl [24]
Isn’t it?
Trying K.
Hope it helps

5 0
3 years ago
Of the 1,640 students enrolled at a school, 50% come to school by bus, 35% come by car, and the rest of the students walk to sch
Nonamiya [84]
Twenty minutes to work over the most would agree that your replying the i
8 0
3 years ago
Read 2 more answers
Other questions:
  • A slide is 10 feet long and 8.8 feet high. How long is its base, from the bottom of the ladder to the end of the slide? If neces
    15·1 answer
  • You have also been asked to set up the basket ball court what is the circumference of the circle
    7·2 answers
  • the shelf life of fresh bread has a mean of 6 days with a standard deviation of 1/2 of a day. what percent of loaves at the bake
    15·1 answer
  • Daria selected a number from the positive integers less than 10. What is the probability that she selected a prime number?
    5·2 answers
  • I need help with this question
    11·2 answers
  • Is the pq in 7pq a variable,constant or coefficient
    13·1 answer
  • Help please thank you​
    7·1 answer
  • Can someone do this? it based on angles so yea thank&lt;3 giving a lot of points so don't make this go to waste
    15·1 answer
  • What is the ratio of the people who prefer vanilla to the people who prefer strawberry?
    9·1 answer
  • The manager of a food store noted that for every 20 persons who visit the store, they sell 6 burgers at $2.35 each, 8 aerated dr
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!