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
Andreyy89
4 years ago
12

X^2-5x-8=0 find the roots (zeros)

Mathematics
1 answer:
melomori [17]4 years ago
5 0

Answer:

             x_1=\dfrac{5-\sqrt{57}}{2}\ ,\quad x_2=\dfrac{5+\sqrt{57}}{2}

Step-by-step explanation:

x^2-5x-8=0\\\\a=1\,,\ b=-5\,,\ c=-8\\\\x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\x=\dfrac{-(-5)\pm\sqrt{(-5)^2-4\cdot1\cdot(-8)}}{2\cdot1}=\dfrac{5\pm\sqrt{25+32}}{2}=\dfrac{5\pm\sqrt{57}}{2}

You might be interested in
A number y minus 8 is 23.
svp [43]

Answer:

31

Step-by-step explanation:

/

4 0
3 years ago
Solve |√2-y| = |y-√2|
DerKrebs [107]

Answer:

Step-by-step explanation:

|√2-y|=|y-√2|

√2-y=±(y-√2)

when √2-y=y-√2

y+y=√2+√2

2y=2√2

y=√2

when √2-y=-(y-√2)

√2-y=-y+√2

or 0=0

it gives no value of y.

so only possible value is y=√2

6 0
2 years ago
How do you do this please help!
MrMuchimi
I'll do 3 and 4, and you can do 5 and 6 on your own!

For 3, we know that a perpendicular line's slope is -1/the other one, so the form is y=x/5+b (b being any number). Plugging -5 and -3 in, we get -3=-1+b. Adding 1 to both sides, we get -2=b and our equation being y=x/5-2 (since our standard form is y=mx+b with y and x remaining variables)

For 4, parallel means the same slope, so we have y=-2x/5+b. Plugging (2,4) in, we get 4=-4/5+b. Adding 4/5 to both sides, we get 4+4/5=b and our equation being y=-2x/5+4+4/5
3 0
4 years ago
A. Determine whether the sequence is an addiction pattern, a multiplication pattern, or neither.
oksian1 [2.3K]

Answer:

A. Neither

B. n²

C. 5² = 25

D. 10² = 100

3 0
4 years ago
What is the graph of y = sin(x) + cos(x) ?
Veseljchak [2.6K]
Hello,

Here is your graph.

5 0
3 years ago
Other questions:
  • What is x^2 + 4x-3 =0 , solve by completing the square.
    14·1 answer
  • Solve this equation 5x–4=3x+18.
    7·2 answers
  • What is the image point of (6,3) after translation right 1 until and up 1 unit
    12·1 answer
  • Which set of angles are alternate interior angles
    12·1 answer
  • Y=3x+3<br> What is the answer
    5·1 answer
  • sherane rolls a standard, six-sided number cube. what is the probability of rolling a multiple of 3?​
    12·2 answers
  • You use a garden hose to fill a wading pool. If the water level rises 17 centimeters every 6 minutes and you record the data poi
    7·1 answer
  • Help help help help
    5·1 answer
  • Calculate the slope of each line. Click on the appropriate cell in the table to highlight the line you are interested in.
    5·1 answer
  • Exit Ticket/CFU/You try:<br> Find the difference: (3 - 2i) - (5 - 6i). Show your work below.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!