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
olasank [31]
2 years ago
5

X^2-4x+6=0 solve by completing square ​

Mathematics
1 answer:
agasfer [191]2 years ago
8 0

Complete the square:

x² - 4x + 6 = 0

x² - 4x = -6

x² - 4x + 4 = -6 + 4

(x - 2)² = -2

But the left side is positive for any real number x, so there are no real solutions.

If you're solving over the complex numbers, we can go on to say

x - 2 = ± √(-2)

x - 2 = ± 2i

x = 2 ± 2i

where i = √(-1).

You might be interested in
Given: X = r + 2, Y = 2r - 9, and Z = r 2 + 17r + 30. Simplify [X · Y - Z] ÷ X. -r - 24 r - 24 2r2 - 6r - 33 2r2 + 6r + 33
melamori03 [73]

Answer:

r - 24

Step-by-step explanation:

[X · Y - Z] = (r + 2)(2r - 9)] - (r^2 + 17r + 30)

= (2r^2 + 4r - 9r - 18 ) - r^2 - 17r - 30

= 2r^2 - 5r - 18 - r^2 - 17r - 30

= r^2 - 22r - 48

= (r +2)(r - 24)

so

[X · Y - Z] / X

= [(r +2)(r - 24)]  /  (r + 2)

= r - 24

7 0
4 years ago
Read 2 more answers
Consider an assembly line with 20 stations. Each station has a 0.5% probability of making a defect. At the end of the line, an i
vova2212 [387]
The answer is 0.4%. The probability that a unit end in a rework can be calculated using the following equation:

P(rework)= P(defects found) * P(defect)
                = .8 * .005
                = .004
                = 0.4%

Thank you for posting your question. Feel free to ask me more.
6 0
3 years ago
Help please, ffor a test
pentagon [3]

Answer:

No

Yes

No

Yes

Step-by-step explanation:

6 0
3 years ago
What is the x value of -2x+3y=3 , x+2y=2?<br><br> -4<br> -3<br> -2<br> 4
Vera_Pavlovna [14]

Answer:

-2

Step-by-step explanation:

-2x+1x=-2

4 0
3 years ago
Read 2 more answers
Helpppppp meeeeeeeeee dadddyyyyy
cricket20 [7]

Answer:

4m-3 would be the answer

5 0
3 years ago
Other questions:
  • Which triangle similarity postulate can be used to prove that triangle XYZ is similar to triangle ABC?
    9·2 answers
  • What is the equation of the line that passes through (-1,-4) and (9,-5) ?
    14·1 answer
  • What times what equals -36 and adds up to -5
    10·1 answer
  • How’s to find the numbers in between
    6·1 answer
  • ANSWER FOR BRAINLEST Debbie is making an abstract painting with two triangles. The dimensions of the painting are shown below: T
    12·2 answers
  • What is the equation of this line in standard form?
    12·2 answers
  • Alex made $28.74 for three hours of work at his job at the pet store . If he works a total of 40 hours in one week , how much mo
    12·1 answer
  • Hii please help i’ll give brainliest:)
    7·1 answer
  • A sixth grade class conducted a survey. They asked 40 of their friends how many of them had a pet. The survey showed that 18 of
    10·2 answers
  • Find the surface area of the prism. 8 4 14
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!