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
lord [1]
3 years ago
5

Solve x2 + 8x − 3 = 0 using the completing-the-square method.

Mathematics
1 answer:
ICE Princess25 [194]3 years ago
4 0

Answer:

Step-by-step explanation:

x^2+8x-3=0 (move constant to other side by adding 3 to each side)

x^2+8x=3 (halve thr linear coefficient, square it and add to each side, (8/2)^2=16)

x^2+8x+16=3+16 (now the left side is a perfect square)

(x+4)^2=19 (now take the square root of each side)

x+4=+-(19^(1/2)) (finally subtract the constant to isolate x by itself)

x= -4+-(19^(1/2))

x=negative four plus or minus the square root of nineteen

You might be interested in
How many liters of pure water should be mixed with 18 liters of a12% saline solution to make a saline solution that is 3% salt?
Volgvan

Answer: .42857 liters of pure water


Step-by-step explanation:2.4 = .7w + 2.1

2.4 - 2.1 = .7w

.3 = .7w

w = .3%2F.7


3 0
3 years ago
Stefanie bought a package of pencils for $1.75 and some erasers that cost $0.25 each. She paid a total of $4.25 for these items,
pentagon [3]

Firstly, we’d have to find the total price paid for erasers by subtracting the overall price from the amount she paid in pencils.

$4.25 - $1.75 = $2.50

From there, we can use the amount per eraser to find out how many erasers she bought. Since she spent $2.50 in erasers, we can multiply to find our missing number.

$0.25 x 10 = $2.50

Therefore, Stefanie bought 10 erasers.

Hope this helps! :)

3 0
3 years ago
Read 2 more answers
Please help, make sure to do a step by step so i'm not cheating, i just need some help .
sashaice [31]
If I am correct it should be the second one
8 0
3 years ago
48 ÷ 6 = ____ Problem Read aloude Which answer below can be used to solve the division problem above? A 6 × ___ = 48 B 48 × 6 =
blagie [28]

Answer:

A) 6 x ___ = 48

Step-by-step explanation:

Transposition

(48 / 6) x 6 = ___ x 6

48 = ___ x 6

5 0
2 years ago
Read 2 more answers
Use the given line(s) from a random number table to select numbers to use in each problem. Select 2 contestants for a game show
jeyben [28]

The solution would be like this for this specific problem:

Given:

46547 17395 25765 11325 14071 61688

 

You want two-digit numbers between 01 and 50, so break it up into chunks of two and eliminate any string that is not between 01 and 50.

 

So, the numbers from the string are:

 

46 54 71 73 95 25 76 51 13 25 14 07 16 16 88

 

Eliminated numbers:

 

54 71 73 95 25 76 51 88

 

Numbers remaining:

46 25 13 14 07 16

 

So, the 2 contestants from a game show out of a pool of 50 would be 46 and 25 (since these are the possible contestants based from the given).

5 0
3 years ago
Other questions:
  • Question 45 An art teacher is cleaning up her room at the end of the week. She combines three jars containing 212 ounces, 825 ou
    14·1 answer
  • The digit 2 in which number represents a value of
    13·1 answer
  • BRAINLIEST!!PLEASE HELP ME!!
    9·2 answers
  • Tracy took a quiz containing 12 items. If she answered 5/6 of them right, how many did she answer correctly?
    6·2 answers
  • Identify the correct property of equality to solve each equation.
    9·2 answers
  • A company makes candles in the shape of a right cone. The lateral surface of each candle is covered with
    13·1 answer
  • Order the ratios from least to greatest<br> 16/24, 5 to 12, 6:13, 10:17, 13/28
    5·1 answer
  • Please help I’ll give 50 points look at the pic for question
    10·2 answers
  • Angulo suplementario de 22° 39´ 44’’
    15·1 answer
  • Can someone answer the question plz?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!