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
Alexeev081 [22]
2 years ago
9

Solve the quadratic equation 4x2 − 121 = 0. Verify your answer using a difference-of-squares factoring method.

Mathematics
1 answer:
Alenkasestr [34]2 years ago
5 0

Answer:

Option d) is correct

That is x equals plus or minus start fraction 11 over two end fraction

Step-by-step explanation:

Given quadratic equation is 4x^2-121=0

To write the given quadratic equation by using a difference-of-squares factoring method:

4x^2-121=0

The above equation can be written as

4x^2-11^2=0

(2x)^2-11^2=0

The above equation is in the form of difference-of-squares

Therefore the given quadratic equation can be written in the form of difference-of-squares

by factoring method is (2x)^2-11^2=0

(2x+11)(2x-11)=0 (which is in the form a^2-b^2=(a+b)(a-b) )

2x+11=0   or   2x-11=0

x=\frac{-11}{2}    or   2x=11

x=\frac{-11}{2}    or   x=\frac{11}{2}

x=\pm \frac{11}{2}

Therefore option d) is correct

That is x equals plus or minus start fraction 11 over two end fraction

You might be interested in
What is 4x + 8 = 10 ​
riadik2000 [5.3K]
Answer: x= 1/2

4x+8=10 1. Subtract 8 from both sides
-8 -8
——————
4x=2 2. Divide each side by 4
/4 /4
—————— 3. Simplify fraction
x=1/2
8 0
3 years ago
The vertices of a triangle are P(4, 7), Q8, -1), and R(-9, 6). What are the vertices of the image reflected across the x-axis?
natita [175]

Answer:

D.)

Step-by-step explanation:

Reflecting an image/shape over the x axis is reflecting it over a horizontal line, so the x coordinates will stay the same and the y coordinates will be the opposite. Therefore, the answer is D. Hope this helps!

8 0
2 years ago
Write three numbers greater than 20 that have 9 as a factor
Lubov Fominskaja [6]
We just need to find the multiples of 9 that are greater than 20.

9*1 = 9
9*2 = 18
9*3 = 27 
9*4 = 36
9*5 = 45

We can use 27,36, 45, .....
Your final answer should be any multiple of nine greater than 20. I recommend using 27, 36, and 45. Hope this helps!<span />
6 0
3 years ago
Please answer! I will give brainliest to the right answer!
denpristay [2]

Answer: 2, 4

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Which value is equivalent to 4
Bumek [7]

Answer:

Hey!!!!!

It looks like you meant to attach a picture, forgot, or your internet connection went out. Because of whatever the cause, we cannot answer your question!

Could you try reposting it?

Thx!

Sahkfam

8 0
3 years ago
Other questions:
  • Three litres of milk cost r29,95 at shop a and two liters of milk cost r15,95 at shop
    6·1 answer
  • 60% of a number is 90<br> what is 50%of the same number
    12·1 answer
  • If you put $1,500 in a savings account that pays 4% interest compounded continuously, how much money will you have in your accou
    8·2 answers
  • What is the sum of the angle measures of a 32-gon?
    13·1 answer
  • Express it in slope-intercept form.
    12·1 answer
  • Using the two functions listed below, insert numbers in place of the letters a, b, c, and d so that f(x) and g(x) are inverses.
    7·1 answer
  • Please help I'm struggling​
    5·1 answer
  • Free brainiest to the first person to say anything.
    9·1 answer
  • THIS IS URGENT !!!! PLEASE HELP
    11·2 answers
  • Maggie is buying movie tickets that cost $9.50 each of her total is 47.50 Before tax how many movie ticket did she purchase
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!