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
lawyer [7]
3 years ago
5

Solve the quadratic equation by completing the square. (Enter your answers as a comma-separated list.)x2 − 6x − 27 = 0

Mathematics
1 answer:
Alexus [3.1K]3 years ago
8 0
x^2 - 6x - 27 = 0 \\ \\a=1, \ b=-6 , \ c= -27 \\ \\ \Delta =b^2-4ac = (-6)^2 -4\cdot1\cdot (-27) = 36+108 =144 \\ \\x_{1}=\frac{-b-\sqrt{\Delta} }{2a}=\frac{6-\sqrt{144}}{2 }=\frac{ 6-12}{2}=\frac{-6}{2}=-3 \\ \\x_{2}=\frac{-b+\sqrt{\Delta }}{2a}= \frac{6+\sqrt{144}}{2 }=\frac{ 6+12}{2}= \frac{18}{2}=9 \\ \\ \\ Answer : \ x= -3 \ \ or \ \ x= 9
You might be interested in
Please help ASAP!!!!!!!!!!!!
Rom4ik [11]
V = sqrt 64h

H = 76

V = sqrt * 64(76)


Answer:  V = 69.74 ft/sec






Hope that helps!!!!
4 0
3 years ago
HELPPPPPP!!!! PLZZZ!!! (all three answers) ill give brain thing
antiseptic1488 [7]
The car could travel 9,000 ft in 3 hrs .
it would take the car 600 hrs to travel 36,000 ft .
7 0
3 years ago
Which of the following are the correct properties of a slope? Check all that apply. A. A negative slope means that the line move
Svetllana [295]

Answer:A and D

Step-by-step explanation: I am smart trust me :)

7 0
3 years ago
A quadrilateral has vertices A(3, 5), B(2, 0), C(7, 0), and D(8, 5). Which statement about the quadrilateral is true?
Anni [7]
It is A hope i helped
3 0
3 years ago
Read 2 more answers
5/8 plus 1/16 simplified
Mariana [72]
We want to make their denominators the same to add them, their common denominator is 16
So 5/8 will become 10/16
now we can add both fractions easily
10/16 + 1/16 = 11/16
4 0
2 years ago
Other questions:
  • What is 5.63×10^-6 in decimal form?
    7·2 answers
  • It takes 16 minutes for 9 people to paint 8 walls.how many does it take 4 people to paint 6 walls
    13·2 answers
  • A moose population is growing exponentially following the pattern in the table shown below. Assuming that the pattern continues,
    7·1 answer
  • if a circular rug has a radius of 1 yard. what is the area of the rug to the nearest tenth of a square foot
    9·1 answer
  • PLEASE I NEED HELP THIS NEEDS TO GET DONE SOON AND IM STUCK):
    14·1 answer
  • A board that measures 3/4 feet long is cut into 6 equal pieces . What is the length of each price
    9·2 answers
  • HELP SOMEONE PLEASE!!!!!!!!!!!!!!!!!!!
    10·1 answer
  • PLEASE HELP!!! ITS ALMOST DUE!!! ILL MARK BRAINLIEST!!
    14·1 answer
  • Natalie bought 5 hot chocolates for $25. How much was each hot chocolate?
    12·1 answer
  • Peter earns $12.40 each week for doing his chores .Ria earns 1.2 times as much money per week as Peter. How much do Ria earn eac
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!