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
BaLLatris [955]
3 years ago
7

Which of the following is a solution of x2 + 4x + 25?

Mathematics
1 answer:
blondinia [14]3 years ago
5 0
Solve for x:
x^2 + 4 x + 25 = 0     I ssume that's the notation.
Subtract 25 from both sides:
x^2 + 4 x = -25
Add 4 to both sides:
x^2 + 4 x + 4 = -21
Write the left hand side as a square:
(x + 2)^2 = -21
Take the square root of both sides:
x + 2 = i sqrt(21) or x + 2 = -i sqrt(21)
Subtract 2 from both sides:
x = i sqrt(21) - 2 or x + 2 = -i sqrt(21)
Subtract 2 from both sides:
Answer: x = i sqrt(21) - 2 or x = -i sqrt(21) - 2
You might be interested in
Four diners have ordered a platter of desserts. The platter holds 8 chocolate chip cookies and 4 slices of chocolate cheesecake.
Furkat [3]

Answer:

P(Y>1 \cap Y

And we can find this probability like this:

P(Y>1 \cap Y

And we can replace the values and we got:

P(Y>1 \cap Y

Step-by-step explanation:

For this case we define the random variable Y as: the number of slices of cheesecake left on the platter after the first serving. And we have the following distribution for Y:

Y     |     0          1        2         3         4

P(Y) | 0.005  0.114  0.429  0.381  0.071

And we want to find the following probability:

P(Y>1 \cap Y

And we can find this probability like this:

P(Y>1 \cap Y

And we can replace the values and we got:

P(Y>1 \cap Y

3 0
3 years ago
Write the integer that best represents 23 degrees below zero
snow_tiger [21]
The integer would be -23
5 0
3 years ago
Read 2 more answers
A farm lets you pick 3 pints of raspberries for $12.00. Use decimal notation if necessary.
kap26 [50]

Answer:

a=$4.00, B=1/4 a pint per dollar, c= 5

Step-by-step explanation:

8 0
2 years ago
A square rug has an inner square in the center. The side length of the inner square is x inches and the width of the outer regio
Gwar [14]

Answer: area of the outer part of the​ rug= 16 -x²

Step-by-step explanation:

Hi, to answer this question we have to apply the next formula:

Area of a square: Side²

Since the area of the rug including the inner square is:  

Area of the rug = 4² =16 in²

And the area of the inner square is equal to:

Area if the inner square = x²

To obtain the area of the outer part of the rug we have to subtract the area of the inner square to the area of the rug.

Area of the outer part of the rug= 16 -x²

Feel free to ask for more if needed or if you did not understand something.

6 0
3 years ago
Nine times the sum of a number and two is forty five. What is the number?
kondaur [170]

Answer:

3

Step-by-step explanation:

9 x (N + 2)   = 45

9N + 18       = 45

9N              = 27  

N                 = 3  

6 0
3 years ago
Other questions:
  • I made a fort for my pet porcupine by connecting two boxes. The first box is 10meters long, 7 meters wide, and 5meters high. The
    12·2 answers
  • Which linear function represents the line given by the point-slope equation y + 7= -2/3 (x+6)
    5·1 answer
  • The range of the data set is 32. If the largest number in the set is 50, what is the smallest number?
    7·1 answer
  • You're choosing between two car rental companies. Company A charges an initial fee of $15 with $.25 per mile, while Company B on
    15·2 answers
  • What is the difference between -7 and 8?<br><br> 15<br> -15<br> 1<br> -1
    9·2 answers
  • Yul and Sarah's art class started at 11:25 A.M.The class lasted 30 minutes. Yulieft when the class was done. Sarah stayed an ext
    8·1 answer
  • PLZ HELP QUICK I NEED TO TURN THIS IN ;Twice a number is fourteen. Write and solve an equation to nd the number of miles that mu
    9·1 answer
  • I will give brainliest!!!!!
    9·1 answer
  • Can I please have some HELP!!! (Brainllest)
    14·1 answer
  • Which of the following statement(s) describes the rate of change of f over the interval 1.5 ≤ x ≤ 3? Select all that apply.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!