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
DaniilM [7]
2 years ago
10

Use completing the square to solve (x – 12)(x + 4) = 9 for x. x = –1 or 15 x = 1 or 7

Mathematics
2 answers:
4vir4ik [10]2 years ago
6 0
(x - 12)(x + 4) = 9
x² + 4x - 12x - 48 = 9
x² - 8x - 48 = 9    |add 48 to both sides
x² - 8x = 57
x² - 2x · 4 = 57    |add 4² to both sides
x² - 2x · 4 + 4² = 57 + 4²    |use (a - b)² = a² - 2ab + b²
(x - 4)² = 57 + 16
(x - 4)² = 73 ⇔ x - 4 = √73 or x - 4 = -√73    |add 4 to both sides

x = 4 + √73 or x = 4 - √73
zalisa [80]2 years ago
3 0

The answer is D. x=  4+/-\sqrt{73}

You might be interested in
How much would $500 invested at 6% interest compounded monthly be worth after 5 years? round your answer to the nearest cent.
Lady bird [3.3K]
Use this formula: A = P(1 + r/n)^nt, where A is the amount after interest (what you are solving for), P is the amount you invested originally, r is the rate at which it was invested in decimal form, n is the number of times the compounding occurs each year, t is the time in years it is invested. It would look like this: A = 500(1 + [.06/12])^12*5.  Do inside the parenthesis first to get 1 + .005 = 1.005.  Now raise that to the 60th power (12 times 5 is 60) to get 1.34558. Now multiply that by the 500 out front to get a total amount of $674.43
8 0
3 years ago
Read 2 more answers
If you have 9/10 of a pound of granola how many 1/5 pound bags can you fill ?
Lostsunrise [7]

Answer:

4

Step-by-step explanation:

1/5 is the same as 2/10. How many 2's can you put in 9? You can put 4.5 2's in a 9. However, filling half a bag does not fill the entire bag, so the answer would be 4. You can fill 4 full 1/5 pound bags with 9/10 pounds of granola.

3 0
3 years ago
Simplify the answer (3 to the 4th power and (3 to the negative 6th power)​
AlladinOne [14]
3^4 and 3^-6
multiply, add, subtract?
8 0
3 years ago
Jose drove from newyork to Florida. Resting for 1 hour for every 5 hours he drove. if he drove for 35 hours. how many hours did
g100num [7]
7 hours because 35 / 5 is 7
7 0
2 years ago
Read 2 more answers
Evaluate the expression.
stiv31 [10]

Answer:

1/9, decimal form = 0.1 repeating

6 0
2 years ago
Read 2 more answers
Other questions:
  • The circle described by the equation <img src="https://tex.z-dn.net/?f=%28x-3%29%5E%7B2%7D%20%2B%28y%2B4%29%5E%7B2%7D%3D9" id="T
    9·2 answers
  • 2 1/2 divided by 3/2
    10·1 answer
  • Slope of 4 and a y-intercept of (0, 6)
    11·2 answers
  • Need help with all asap please
    5·2 answers
  • 4.1 x 103 ) x (1.6 x 10-2) = a.6.56 x 10 b.6.56 x 105 c.6.56 x 10-5 d.656 x 101
    13·1 answer
  • Consider the following argument. If there are as many rational numbers as there are irrational numbers, then the set of all irra
    6·1 answer
  • Yo need help asap pls !!! markin da brainiest too !!!
    11·1 answer
  • Calculate the areas of these rectangles.
    13·1 answer
  • Nathan saves 5 1/4% of his weekly salary. Naban earns $380.00 per week. How much
    5·1 answer
  • The circumference of a circle is 24 feet. What is the approximate length of the radius? Round to the nearest tenth​
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!