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
True [87]
3 years ago
12

Help needed!! Don’t know how to do!!

Mathematics
2 answers:
anygoal [31]3 years ago
6 0

Answer:

D

Step-by-step explanation:

1) Factorise x

x(2x^4-3x^2-20) = 0

a product is equal to 0 when at least one factor is equal to 0.

so a solution is

x = 0

we have now to solve

2x^4 - 3x^2 - 20 = 0

we can put

x^2 = y

and we have

2y^2 - 3y - 20 = 0

it is now an equation of second degree

Δ = 9 + 160 = 169

y1 = (3 + 13)/4 = 4

y2 = (3 - 13)/4 = -10/4 = -5/2

for the previous relationship we have

x^2 = 4

x = 2

x = -2

x^2 = -5/2

a square number can’t be negative, so this equation is impossible.

In conclusion we can say that the original equation has three solution:

0, -2, 2

Aleks [24]3 years ago
3 0

Answer:

D,0,2,-2

Step-by-step explanation:

2x^5-3x^3-20x=0

x(2x^4-3x^2-20)=0

x=0

or 2x^4-3x^2-20=0

put x²=t

2t²-3t-20=0

-20×2=-40

8-5=3

8×-5=-40

2t²-(8-5)t-20=0

2t²-8t+5t-20=0

2t(t-4)+5(t-4)=0

(t-4)(2t+5)=0

t=4

x²=4

x=2,-2

t=-5/2

x²=-5/2

it gives imaginary  root. so real rational roots are 0,2,-2

You might be interested in
What is the greatest common factor (GCF) of 15 and 64? <br>1. (3) <br>2.(4)<br>3.(8)<br>4.(1)​
omeli [17]
It’s 1.

Explanation: you need to find the greatest factor that works out for them both. You can cross out 4 and 8 because no other whole number can be multiplied to get 15, and it’s not 3 since you can’t multiply it with a whole number to get 64. 1 works for them both.
4 0
3 years ago
Read 2 more answers
Find the height of a rectangle with a base of 11 in and area of 120 in2
Mrac [35]

Answer:

that is the solution to the question

3 0
3 years ago
Which is a quantitative variable?
Neporo4naja [7]

Answer:

B

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Write an equation, in point-slope form, for the line that passes through (1, -5) and has a slope of -3.
Serggg [28]

Answer:

<u>y+5 =-3</u>

x-1

y+5=-3x +3

y=-3x-2

Step-by-step explanation:

8 0
2 years ago
Which function family are these 3? thanks..​
Julli [10]

Answer:

1) Function; Linear Function (y=x)

2) Function; Exponential Function (y=bˣ)

3) Not a function.

Step-by-step explanation:

So, let's go through each table of values. I'm also going to graph them (see attached graphs) because it will make things simpler and provide a visual.

First, also recall what the definition of a function is. A function is a function if and only if an x only has <em>one</em> distinct y-value. No x can have two or more y-values. For instance, (1,2) and (1,3) is <em>not</em> a function between the x repeats. So, let's go through the choices:

1)

We have the table as shown. Let's plot the points. See TABLE 1:

First, there are no repeating x-values, so we can be sure that this is indeed a function.

Looking at the graph, we can see that this resembles a linear graph. So, the parent function of this is a line.

The parent function of a line is:

y=x

So, table 1 is associated with a linear function.

2)

Let's again plot the points. See TABLE 2.

Again, there are no repeating x-values, so this is also a function.

Looking at the graph, this resembles an exponential function. The function increases slowly at first but starts increasing increasingly fast. The parent function is thus an exponential function.

So, table 2 is associated with an exponential function.

3)

First, notice how all the x-coordinates are repeating. And since they do <em>not</em> equal the same thing, this is not a function.

Table 3 is not a function and so has no corresponding family function.

7 0
3 years ago
Read 2 more answers
Other questions:
  • How to solve a system of equations by substitution
    8·1 answer
  • Write the phrase as an expression. the difference of 12 and a number x
    14·2 answers
  • 10×4ones= ____ones=
    15·1 answer
  • A summer camp has divided its campers into 8 groups of 9 campers.How many campers are at the summer camp?
    14·2 answers
  • Can someone tell me if my answer to this problem is correct, please? And if it isn't how do you solve it? ​
    10·1 answer
  • a square has 9 inch sides. every side of a pentagon is also 9 inches long. are their perimeters the same? explain
    6·2 answers
  • You have three consecutive odd integers. Four times the smallest decreased by 5 is the same as the largest increased by 12. What
    8·1 answer
  • Michael works 30 hours per week and makes $15.00 per hour. How much does he make in a 4-week month?
    7·1 answer
  • What is the value of x?<br> HELP PLS NOW AHH
    14·1 answer
  • 6x + 5y =20 solve for y step by step
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!