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
kondaur [170]
3 years ago
11

Susu is solving the quadratic equation 4x2 – 8x – 13 = 0 by completing the square. Her first four steps are shown in the table.

Mathematics
2 answers:
Andrei [34K]3 years ago
7 0

The given Quadratic equation is

4x^2- 8x - 13 = 0\\\\4(x^2-  2 x - \frac{13}{4}) = 0\\\\ (x-1)^2-1^2- \frac{13}{4}=0\\\\ (x-1)^2=\frac{\sqrt{17}}{4}\\\\ x-1=\pm\frac{\sqrt{17}}{4}\\\\ x=1 +\frac{\sqrt{17}}{4} \text{or}     x=1-\frac{\sqrt{17}}{4}

These are the steps to determine the roots as well as solve the quadratic equation.

You can find the mistake by looking at the procedure of solving the quadratic equation by completing the square solved above.


SOVA2 [1]3 years ago
5 0
Its step 2 my guy.....................................









































You might be interested in
you are being deal one card from a standard 52 card deck. what is the probability that you will be dealt a card other than an ac
8090 [49]
I love you please notice me
8 0
2 years ago
Read 2 more answers
How do i turn 7/3 in to a whole #
xenn [34]
Its 2 and 1/3 
as a decimal its 2.3333
there is no possible way it can be written as a whole number
7 0
2 years ago
Read 2 more answers
A group of four boys (Alex, Bryan, Chris, and David) and five girls (Megan, Nancy, Olivia, Pauline, and Rebecc?
aliina [53]

Answer:

a) P = 362880 ways

b) P = 2880 ways

Step-by-step explanation:

a) We have four boys and five girls, they are going to sit together in a row of 9 theater seats, without restrictions

We have a permutation of 9 elements

P = 9!

P = 9*8*7*6*5*4*3*2*1

P = 362880 ways

b) Boys must seat together, we have two groups of people

4 boys  they can seat in 4! different ways

P₁ = 4!

P₁ = 4*3*2*1

P₁ = 24

And girls can seat in 5! dfferent ways

P₂ = 5!

P₂ = 5*4*3*2*1

P₂ = 120

To get total ways in the above mentioned condition, we have to multiply P₁*P₂

P = 24*120

P = 2880 ways

4 0
2 years ago
pe ling needs 2 yards of fabric for a craft project. she has 3 feet already.how many niches of fabric does she still need?
spin [16.1K]
2yards= 72 inches
72 inches= 6 feet

so now that you know that, you know that she needs 6 feet and already has 3 feet. so she just needs 3 feet more. but they are asking for the answer to be in inches. 

3 feet= 36 inches
your answer in 36 inches
5 0
3 years ago
NEED HELP ASAP!! I'm doing trigonometry and I've been stuck on this problem I don't really understand it, if you could help that
Tems11 [23]

Answer:

6.1

Step-by-step explanation:

Draw a picture of an equilateral triangle.  Cut the triangle in half, so that you get two 30-60-90 triangles.  The area of these smaller triangles is 8 square inches.

The short leg of these triangles (the base) is half the side length: ½ s.

According to properties of 30-60-90 triangles, the long leg (the height) is √3 times the short leg: ½ s√3.

Area of a triangle is half the base times the height:

A = ½bh

8 = ½ (½ s) (½ s√3)

8 = ⅛ s²√3

64 = s²√3

s² = 64/√3

s = √(64/√3)

s ≈ 6.1

4 0
3 years ago
Other questions:
  • Compare 7/21 and 3/18 using > < or =
    8·1 answer
  • What is the recursive formula for this geometric sequence? –4, –24, –144, –864, ...
    7·1 answer
  • Identify the population and sample in the following study:
    11·1 answer
  • What are the domain and range of the logarithmic function f(x) = log7x?
    6·1 answer
  • Find the product using identities (3x – 2)(3x+9)
    7·2 answers
  • Describe two methods that can be used to find the area of the composite figure.
    10·2 answers
  • Least to greatest 7.3,7 3/4,7.23,-7 2/3
    6·2 answers
  • How kilograms are in a carton of orange juice?
    6·1 answer
  • Hey please help meeeeeeeeeeeeeeeee please do atleast 2 questions
    15·1 answer
  • SOMEONE HELP <br><br> How do I even solve this?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!