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
iren [92.7K]
3 years ago
15

Determine the solution set of x^2-80=0.

Mathematics
2 answers:
Stella [2.4K]3 years ago
6 0
X^2 - 80 = 0
x^2 = 80 ...take the square root of both sides, eliminating the ^2
x = (+-) sqrt 80
x = (+-) sqrt 16 * 5
x = (+-) 4 sqrt 5

so x = 4 sqrt 5 or x = -4 sqrt 5
eduard3 years ago
5 0

Answer:  The required solution set of the given equation is \{4\sqrt5,-4\sqrt5\}.

Step-by-step explanation:  We are given to determine the solution set of the following quadratic equation :

x^2-80=0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)

Since the given equation does not contain the term involving x, so we will use the method of square root to solve the given equation.

The solution of equation (i) is as follows :

x^2-80=0\\\\\Rightarrow x^2=80\\\\\Rightarrow x=\pm\sqrt{80}~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[\textup{taking square root on both sides}]\\\\\Rightarrow x=\pm\sqrt{16\times5}\\\\\Rightarrow x=\pm4\sqrt5.

Thus, the required solution set of the given equation is \{4\sqrt5,-4\sqrt5\}.

You might be interested in
Merit works in a florist shop and makes flower arrangements
Vikentia [17]
So what is the question
5 0
3 years ago
What's the area of the composite figure below ?
JulsSmile [24]

Answer:

31.13

Step-by-step explanation:

If you look carefully, you will find a semicircle and a triangle.

The total area is =

\frac{\pi r^{2}}{2} + \frac{1}{2} \times base \times height\\

  • r = 4 - 0 = 4
  • base = |-4-0 | = 4
  • height = 14 - 9 = 5

So if we put the values:

\frac{\pi \times 4^{2}}{2} + \frac{1}{2} \times 4 \times 3\\= 31.13

3 0
3 years ago
Evelyn has $524.96 in her checking account. She must maintain a $500 balance to avoid a fee. She wrote a check for $32.50 today.
postnew [5]

Answer:

You answer would be $7.54

Step-by-step explanation:

You need to subtract 32.50 from 524.96. That would be 492.46. Then subtract 492.46 from 500. Hope that helps!!

4 0
3 years ago
Solve the equation. If there is no solution, select no solution.
sergey [27]

Answer:

no solution to the question

6 0
3 years ago
Read 2 more answers
Pls help me help my little cuz to understand pls BONUS POINTS!
aliya0001 [1]
Which part do you need help on?
7 0
3 years ago
Read 2 more answers
Other questions:
  • How much should my refund be if i will receive 90% of 200 back?
    9·1 answer
  • Find the surface area of a right square pyramid if the area of the base is 3636 cm squaredcm2 and the height of the pyramid is 6
    8·2 answers
  • Area of ice rink is 404 sq yes what is perimeter
    8·1 answer
  • 5 Ib equals how many oz
    8·2 answers
  • Compare these fractions Zero this is what then 0/9
    11·1 answer
  • Question 2: 15% of the students in the marching band wear glasses. If 12 students wear glasses how many students are in the marc
    10·1 answer
  • Please help me out, I don't get it
    12·1 answer
  • Are all real numbers and imaginary numbers also complex numbers? Explain, using the parts of a complex number.
    13·1 answer
  • How do you find the value of 35(10^-8)? Find the answer.
    15·1 answer
  • The 5th grade students at Fox Middle School went to a movie. They spent a total of $1357.50 on movie tickets. If each movie tick
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!