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
liq [111]
3 years ago
8

Completing the square. a^2+2a-3=0

Mathematics
1 answer:
oksian1 [2.3K]3 years ago
8 0

a^2 + 2a - 3 = 0

a^2 + 2a = 3

a^2 + 2a + 1 = 3 + 1 (I added a 1 to both sides)

a^2 + 2a + 1= 4

(a + 1)^2 = 4

a = -3, 1

You might be interested in
Select all quantities that are proportional to the diagonal length of a square.
horsena [70]

Answer:

B. Perimeter of a square and

C. Side length of a square​

Step-by-step explanation:

if n= side length of square then

  • Area of square is n^{2}
  • Perimeter of a square is 4×n
  • diagonal length of a square is \sqrt{2} × n

Thus,

Perimeter of square can be expressed as

2\sqrt{2}×diagonal length of a square

Side length of a square can be expressed as

\frac{1}{\sqrt{2} }×diagonal length of a square

but Area of square is

\frac{1}{\sqrt{2} }×n×diagonal length of a square

As a Result,  Area of square is <em>also dependent of the value n</em>, wheras in other cases it is <em>a proportion of diagonal length of a square</em>

5 0
3 years ago
Delaney scored -15 points in a word game. Find the opposite of this integer
-Dominant- [34]

Answer:

positive 15

Step-by-step explanation:

opposite of negative is positive

8 0
3 years ago
jenna has a piece of paper that is 84 square inches in area. it is 10 1/2 inches long. what is the length of the piece of paper
skad [1K]
Here is the solution based on the given problem above.
Given: Area of the piece of paper = 84 square inches
           Width = 10 1/2 or 10.5 inches long
           ? = length of the piece of paper
To find the area of an object, the formula would be A= L x W
Now, let's substitute the given values above
84in2 = L(10.5in)
Now, divide both sides with 10.5 and we get 8.
L = 8 inches.
Therefore, the length of the paper is 8 inches. 
Hope this solution helps. 
4 0
3 years ago
Stacey went to six different auto repair shops to get the following estimates to repair her car.
topjm [15]

Answer:

534 is the mean.

Step-by-step explanation:

to calculate the mean you add all the numbers together (for example this set of numbers):

785, 585, 465, 409, 495, 465

=3204

then divide the number of numbers that you added together , (in this case 6)

3204/6

=

534

5 0
3 years ago
Simplify (question is in the picture)
Sholpan [36]
Your answer is 26.9 so u could round it up to 27
3 0
3 years ago
Read 2 more answers
Other questions:
  • In which expression should the exponents be multiplied?
    14·1 answer
  • Toys R Us is having a 38% off sale on all their backpacks. If a backpack normally costs $22.00:how much will it be on sale.
    6·2 answers
  • PLEASE HELP ME!!!!! What is the equation of the line that passes through the points (−2, 3) and (2, 7)? (5 points) a. x − y = −1
    13·2 answers
  • I don’t know how to do this
    8·2 answers
  • Chet bought 3.54 pounds of cheese for his party. If each of his guesis
    8·1 answer
  • The expression 1.01*1.005(^t) gives the amount of money, in thousands of dollars, in Carter's savings account (t) years after he
    13·1 answer
  • How to solve this equations?
    7·1 answer
  • Which of the following represents the given word problem if "p" represents the population 10 years ago
    7·1 answer
  • Which graph represents the solution set of the inequality x+2&gt; 6?
    7·1 answer
  • What value of w makes the equation true? Please explain: <br><br> -10w + 12= -9w +13
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!