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
stiv31 [10]
3 years ago
9

X^2 - 8x = 3 by completing the square

Mathematics
1 answer:
Anit [1.1K]3 years ago
3 0
<h2>Solving Quadratic Equations by Completing the Square Method</h2><h3>Answer:</h3>

x = 4 +\sqrt{19} and x = 4 -\sqrt{19}

<h3>Step-by-step explanation:</h3>

Recall:

x^2 -2ax +a^2 = (x -a)^2

x^2 -8x = 3 \\ x^2 -8x +16 = 3 +16 \\ (x -4)^2 = 19 \\ x -4 = ±\sqrt{19} \\ x = 4 ±\sqrt{19}

You might be interested in
Solve the equation algebraically for all values of X
noname [10]
This is a problem you need to solve using logs. When you use logs you can "pull" the exponents down in front of the log to get a new equation that looks like this: 2x^3 + x^2 log 81 = 6x - 3 log 27. Now divide both sides by log 81 and 6x - 3 simultaneously to get (2x^3 + x^2)/(6x - 3) = (log 27)/(log 81). If you do the log math on the right side you get .75. Now multiply both sides by 6x-3 to get 2x^3+x^2 = .75(6x-3). If you distribute that out on the left side you'll get 2x^3+x^2=4.5x-2.25. Now move everything over to the left side and set the whole thing equal to 0: 2x^3+x^2-4.5x+2.25=0. When you solve for x, you are in essence factoring, so do this by grouping: x^2(2x+1)-2.25(2x+1). Now finally factor out the 2x+1 to get (2x+1)(x^2-2.25). You're not done yet though cuz you need to solve each of those for x: 2x+1=0, and x= -1/2; x^2=2.25, and x=+/- 1.5. So all the values for x here are -1/2, 1.5, and -1.5

5 0
3 years ago
If A=3x^2+5x-6 and B= -2x^2-6x=7, then A-B equals
Kryger [21]
Yup ur right les goo
6 0
2 years ago
A coordinate plane is shown.
frutty [35]

Answer:

The answer is C

Step-by-step explanation:

First you would start at the origin then move 3 units to the right then move 6 units up then that is your point

8 0
2 years ago
Read 2 more answers
A right regular pentagonal prism has a base edge length 14 cm, and height 12 cm. Identify the volume of the prism to the nearest
maks197457 [2]

Answer:

4046.56 cm3

Step-by-step explanation:

The base is made by 5 isosceles triangles, with one side of 14 cm, and the opposite angle of \frac{360} 5 = 72°. Each of the other angle is \frac{180-72} {2} =54°. From there, you can calculate the height of each base triangle as in \frac {h} 7 = tan54 or 9.634...cm.

Your volume will be 5 * \frac  {(14 * 9.634)} 2 * 12 = 4046.56 cm^3

7 0
3 years ago
Which is a way to break the irregular figure into shapes
STALIN [3.7K]

Answer:

1 parallelogram and 1 rectangle

Step-by-step explanation:

ajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhvdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjhajkdfalksjdfhhsldfjhaskdhflksjdhfaljhfieufhlkjdsfkaljhfkajhlifkajhfalkjh

8 0
3 years ago
Read 2 more answers
Other questions:
  • Maggie drew lines of best fit for two scatter plots, as shown. Which statement best describes the placement of the lines Maggie
    11·1 answer
  • What is the mean mark in5,8,4,3,7,6,2,9 and 1​
    11·2 answers
  • Raymond bought a used truck for $18,800. If the sales tax in his state is 7 percent, what was the final price for his car?
    10·2 answers
  • The value of 34 + 6 ⋅ 5 = ___.<br><br> Numerical Answers Expected
    8·1 answer
  • Multiply using cancellation:<br><br> 2/5 x 5/7 =
    15·2 answers
  • How much times can 23 go into 13,527​
    9·2 answers
  • Which of the following are concidered skew lines?
    10·1 answer
  • At the end of dinner, a restaurant had several dishes of quiche, each with 2 sixth-size pieces of quiche. the chef was able to c
    12·1 answer
  • Convert 562 hectograms to pounds to the nearest hundredth
    12·2 answers
  • 2.247 divided into 7 equals what​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!