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
zvonat [6]
3 years ago
6

Solve the quadratic equation by completing the square. ATTACHED BELOW!!!!!!NEED HELP FAST!!!!!!!!!!!!!

Mathematics
2 answers:
arsen [322]3 years ago
4 0

Answer:

See below in bold.

Step-by-step explanation:

x^2 -10x + 20 = 0

x^2 - 10x = -20

Completing the square:

(x - 5)^2 - 5^2 = -20

(x - 5)^2 =  25 - 20

(x - 5)^2 = 5.

Solving the equation:

Taking square roots:

x - 5 = +/-√5

x = 5 + √5,    5 - √5.

To the nearest hundredth that is

7.24, 2.76.

Andrew [12]3 years ago
4 0

Answer:

x ≈ 2.76, x ≈ 7.24

Step-by-step explanation:

Given

x² - 10x + 20 = 0 ( subtract 20 from both sides )

x² - 10x = - 20

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2( - 5)x + 25 = - 20 + 25

(x - 5)² = 5 ( take the square root of both sides )

x - 5 = ± \sqrt{5} ( add 5 to both sides )

x = 5 ± \sqrt{5}

Hence

x = 5 - \sqrt{5} ≈ 2.76

x = 5 + \sqrt{5} ≈ 7.24

You might be interested in
Ill mark brainlist plss help
Hatshy [7]

Answer:

\frac{3×7}{5×7}   \frac{21}{35}

5 0
3 years ago
The map at the right has an Euler Path in which you can pass through each doorway exactly once. Which 2 rooms must be a starting
bogdanovich [222]

Answer:I think the answer is d

Step-by-step explanation:

5 0
3 years ago
Mike has a net spendable income of $1,400. He decides to set up a budget before looking for an apartment or a car. He sets up hi
Shtirlitz [24]

C.) Mike is using the minimum recommended percentages for food, housing, and transportation. The costs are likely to exceed the expenses in each category.


7 0
3 years ago
Read 2 more answers
A cylinder has a radius of 3 in and a volume of approximately 136.78 in? What is the height of the cylinder?
Aleonysh [2.5K]

Answer:

4.835(I don't know unit.(m/in/cm)

Step-by-step explanation:

volume=πr^2h

136.78=22÷7×3^2×h

h=136.78×7÷(22×9)=4.835

7 0
3 years ago
PLEASE HELP
algol13

Independent events mean that one event happening does not have to have the other event to happen.

The probability of both events happening is the product of the events.

The answer would be:

E. P(A ∩ B) = P(A) x P(B)

8 0
3 years ago
Read 2 more answers
Other questions:
  • Given f(x) = 7x – √2 and g(x) = x + √2, find (f – g)(x).
    10·1 answer
  • Given the function f(x)=x2+2x+1, find:<br><br> f( (2a−3)/5 ) =<br><br> Show working please!
    5·1 answer
  • On monday maggie ran n miles, on tuesday she ran 90% of the number of miles that she ran on monday. on wednesday she ran 50% of
    6·1 answer
  • What are 3 consecutive numbers that is the sum of -27.please be right.use odd numbers
    12·1 answer
  • How do solve this (-m ^3)(7z)
    5·1 answer
  • Round 24579 to 3 significant figures ​
    8·1 answer
  • John and 3 friends are going out for pizza. They split one pizza and 4 large drinks. The pizza cost $11.50. They spend a total o
    14·2 answers
  • Alguien me ayuda pls
    12·1 answer
  • 1/10 + 3/10 + 3/10 + 1 1/10
    6·2 answers
  • Please help i will give 100 points
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!