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
zlopas [31]
2 years ago
13

Complete the squar3

Mathematics
1 answer:
cricket20 [7]2 years ago
8 0

9514 1404 393

Answer:

  1. 4
  2. -2
  3. 4
  4. 2
  5. -2±√2

Step-by-step explanation:

In order to fill the first blank, we need to look at the second line to see what the coefficient of x is.

  1. x² +<u> </u><u>4 </u>x +2 = 0

The constant is subtracted from both sides to get the second line.

  2. x² +4x = <u> -2 </u>

The value that is added on the third line is the square of half the x-coefficient: (4/2)² = 4

  3. x² +4x +<u> 4 </u> = -2 +4

On the fourth line, the left side is written as a square, and the right side is simplified. The square root is taken of both sides.

  4. √(x +2)² = ±√<u> 2 </u>

Finally, 2 is subtracted from both sides to find the values of x.

  5. x = <u> -2 ±√2 </u>

You might be interested in
If the MAD for a forecast is 3.2, we can say that a. The forecast is 3.2 units too high on the average b. The forecast is 3.2 un
Rudik [331]

Answer:

The forecast is accurate within plus or minus 3.2 units

Step-by-step explanation:

Mean Absolute Deviation is a statistical measure of dispersion from forecast. It measures accuracy level of predicted forecast, by averaging the difference between absolute value of each error from forecasted value.

MAD for a forecast states that : Forecast is accurate within the expected range variation of Mean Absolute Deviation.

So : If the MAD for a forecast is 3.2, we can say that -  The forecast is accurate within plus or minus 3.2 units

3 0
3 years ago
The coefficient of 6x is _____?<br> A.6<br> B.x<br> C.1
ArbitrLikvidat [17]
A.6 
<span>because a coefficient is the numerical constant quantity placed before and multiplying the variable in an algebraic expression. (eg 5x so the coeff is 5)</span><span />
7 0
3 years ago
Read 2 more answers
Which linear equation represents on the graph
s2008m [1.1K]

Remember, rise/run is the easiest way to determine slope

y=mx+b is form

mx is slope, whilst b is y int

so, answer? y=-3x-2

Or A.

4 0
3 years ago
The midpoint of AB is M(1, -1). If the coordinates of A are (7, -4), what are the
Lera25 [3.4K]

Answer:

The point which is the midpoint is equally spaced from both ends of the line. We know the coordinates of A and we know the coordinates of M, the midpoint.

Step-by-step explanation:

3 0
2 years ago
What is the perimeter of the rectangle shown below?
lora16 [44]

Answer:

Step-by-step explanation:

Idk

8 0
3 years ago
Other questions:
  • Samantha has $600 saved for a trip.She buys an airline ticket for $120 and reserves a hotel room for $55 each night for 4 nights
    7·2 answers
  • Which of the following statements describes one part of completing the square for x2 + 4x = 32?
    7·1 answer
  • GIVING CROWN IS RIGHT!!!!!!
    11·1 answer
  • Write an equation in​ slope-intercept form of the line with the given slope m and​ y-intercept
    9·1 answer
  • Point S is between points R and T. Given that<br> RS ST and RS = 16, what is RT?
    6·1 answer
  • Which statements are true based on the diagram? <br> Check all that apply.
    11·1 answer
  • An item sells for $30 and is on sale for 15% off and the sales tax is 8.2%. What is the final cost to the nearest cent? (Calcula
    14·1 answer
  • NOONE IS HELPING ME, THIS IS FOR A GRADE
    8·2 answers
  • Complete all the problems.<br> 1.<br> X - 6 = -24<br> Solve for x.
    12·2 answers
  • HELP ASP
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!