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
REY [17]
3 years ago
15

Solve the quadratic equation by completing the square. 4x2 + 8x - 7 = 0

Mathematics
1 answer:
padilas [110]3 years ago
5 0

Step-by-step explanation:

4x² + 8x − 7 = 0

4x² + 8x = 7

x² + 2x = 7/4

x² + 2x + 1 = 11/4

(x + 1)² = 11/4

x + 1 = ±√(11/4)

x = -1 ± √(11/4)

You might be interested in
Which term completes the product so that it is the difference of squares?<br>(-5x-3)(-5x+<br>)​
lilavasa [31]

Hello,

(-5x-3)(-5x+ 3) = (-5x)² - 3²

7 0
2 years ago
Negation of no planes have three wheels
anygoal [31]
Ohyeah free points bruhoo
5 0
3 years ago
Complete the point-slope equation of the line through (2,3 and (7,4). Use exact numbers.
uysha [10]

The point-slope equation of the line is y-3=\frac{1}{5}(x-2)

Step-by-step explanation:

The form of the point-slope equation is y-y_{1}=m(x-x_{1}) , where

  • m is the lope of the line
  • (x_{1},y_{1}) is a point lies on the line

The slope of a line m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}} , where

(x_{1},y_{1}) and (x_{2},y_{2}) are two points on the line

∵ The line through (2 , 3) and (7 , 4)

∴ x_{1} = 2 and x_{2} = 7

∴ y_{1} = 3 and y_{2} = 4

- Substitute these value in the rule of the slope

∵ m=\frac{4-3}{7-2}=\frac{1}{5}

∴ the slope of the line is m=\frac{1}{5}

Let us substitute the value of the slope and the coordinates of point (x_{1},y_{1}) in the form of the equation

∵ y-y_{1}=m(x-x_{1})

∵ x_{1} = 2 and y_{1} = 3

∵ m=\frac{1}{5}

∴ y-3=\frac{1}{5}(x-2)

The point-slope equation of the line is y-3=\frac{1}{5}(x-2)

Learn more:

You can learn more about the linear equation in brainly.com/question/12941985

#LearnwithBrainly

3 0
3 years ago
Which is an equation of a line that has a slope of -1/3 and passes through the point (-5, 2)?
kramer

Answer:

y= -⅓x +⅓

Step-by-step explanation:

The equation of a line is usually written in the form of y=mx+c, where m is the gradient and c is the y-intercept.

This form is also known as the point-slope form.

Since the slope is given to be -⅓, m= -⅓.

y= -⅓x +c

To find the value of c, substitute a pair of coordinates into the equation.

When x= -5, y=2,

2= -⅓(-5) +c

2 =  \frac{5}{3}  + c \\ c = 2 -  \frac{5}{3}  \\ c =  \frac{1}{3}

Thus, the equation of the line is y= -⅓x +⅓.

7 0
3 years ago
Solve the inequality:<br><br> 2x + 3 &gt; -11
Kruka [31]

Answer:

x > − 7

Step-by-step explanation:

hope this helps

7 0
2 years ago
Other questions:
  • Betsy and her 3 friends are splitting awhole watermelon there are 6 circular slices of watermelon.how many slices get each perso
    13·2 answers
  • PLS Answer these questions, I have a test!
    8·2 answers
  • HELP THANKS LOVE YOU
    15·2 answers
  • Find the surface area of a cylinder with a base radius of 4m and a height of 5m.
    9·1 answer
  • What is the value of this expression?<br> (11,328)°
    10·1 answer
  • Frodo ran miles in of an hour. How many miles can Frodo run in one hour?
    7·1 answer
  • What is the solution to the system of equations below
    13·1 answer
  • Someone help 10<br> Points !
    6·2 answers
  • G The swimmer's legs appear shorter while in teh pool because of the of lights
    11·1 answer
  • Plz I need help plz plz plz
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!