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
Alexus [3.1K]
3 years ago
10

Solve the quadratic equation by completing the square. x2 + 6x + 7 = 0

Mathematics
1 answer:
ruslelena [56]3 years ago
7 0
Hello,

x²+2*3x+3²+7-9=0
==>(x+3)²-2=0
==>(x+3-√2)(x+3+√2)=0
==> x=-3+√2 or x=-3-√2
You might be interested in
Mental math explanation
Allushta [10]
Mental math is something that can be done i your head. 

for example you can do 1+1 in your head and you dont need a calculator or paper to do it so i would be called mental math

Hope this helps

remember if you ever need anything and you dont want to waste points you can just post it on my pfp or message me the question

7 0
3 years ago
Read 2 more answers
How to find volume of a drawing of a piece of cake?
Ipatiy [6.2K]
Just find the volume of a triangular prism.

volume=1/2*length*width*height.
8 0
3 years ago
Elijah earns $200 for 8 hours of work.What is the rate (in dollars per item)
MAXImum [283]
25 dollars per hour should be the correct answer
6 0
3 years ago
Brenna writes a product of six negative factors. She uses the following steps to determine that the product of the six numbers w
Orlov [11]

Answer:

A

Step-by-step explanation:

The product of two numbers with the same sign is positive.

Since the numbers in each pair have the same sign, the product will be positive.

4 0
3 years ago
Read 2 more answers
Write the equation of each line using the given information.
Leni [432]

a) x – 2y + 6 = 0 b) x + y = 1 c) y = 1 d) y = -3x + 8

<h3><u>Solution:</u></h3>

<em><u>a. The points (-4,1) and (2,4) both lie on the line</u></em>

The general line equation on which (a, b) and (c, d) lies is:

y-\mathrm{b}=\frac{d-b}{c-a}(x - a)

Here the given points are (a, b) = (-4, 1) and (c, d) = (2, 4)

Thus the required equation is:

y-1=\frac{4-1}{2-(-4)}(x-(-4))

On solving we get,

\begin{array}{l}{\rightarrow y-1=\frac{3}{2+4}(x+4)} \\\\ {\rightarrow y-1=\frac{3}{6}(x+4)} \\\\ {\rightarrow 2(y-1)=1(x+4)} \\\\ {\rightarrow 2 y-2=x+4} \\\\ {\rightarrow x-2 y+6=0}\end{array}

<em><u>b.) m= -1 and the point (2, -1) lies on the line</u></em>

The equation of line in point slope form is y – b = m(x – a)  

where m is slope and (a, b) is a point on it

Here m = -1 and (a, b) = (2, -1)

Thus the required equation is:

y – (-1) = -1(x - 2)  

y + 1 = -x + 2  

y = -x + 2 -1  

y = -x + 1

<em><u>c. )It has the same slope as y = 5 and passes through (1, 1)</u></em>

our line has same slope with y = 5, then our equation would be y = k  and it passes through (x, y) = (1, 1) so, then by substitution

1 = k

k =1  

Then our equation will be y = k

y = 1

<em><u> d. ) m= -3 and it has a y-intercept of (0, 8)</u></em>

line equation in slope intercept form is y = mx + b where m is slope and b is y – intercept.

Then, our equation will be y = -3x + 8

We took y- intercept = 8 as it is the value of y when x = 0

6 0
3 years ago
Other questions:
  • 1 -1 plus 23 plus 59 times 3 - 2 =
    5·2 answers
  • Which is a factor of 4x2 + 36x + 72?
    11·2 answers
  • In a survey of 120 people, 18 stated they were not registered to vote. Which value would represent this group in a pie chart?
    14·2 answers
  • What is the number between 1026 and 1254
    12·2 answers
  • An object with a mass of 2000 g accelerates 8.3 m/s² when an unknown force is applied to it. What is the amount of force?
    15·1 answer
  • Transforming the graph of f into graph of g where f (x) =square root of x and g (x)=square root of x+3
    5·1 answer
  • There is a building, if you are observing from the outside it looks like a parallelogram with one of the interior angles as 108.
    12·1 answer
  • 6.5(6.24-1.69)=?<br> pls help
    10·2 answers
  • 1. Bob makes $14 per
    14·1 answer
  • A necklace usually sells for 18, but is onsale for 15% off. What is the sale price of the necklace?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!