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
Fittoniya [83]
3 years ago
15

K(x) = x^3 +2x^2-x-2 find all roots

Mathematics
1 answer:
Liono4ka [1.6K]3 years ago
3 0
<h2>The all roots are equation are 1, - 1 and - 2.</h2>

Step-by-step explanation:

The given cubic polynomial:

k(x) = x^3 + 2x^2 - x -2

To find, the all roots are x^3 + 2x^2 - x -2 = ?

∴ k(x) = x^3 + 2x^2 - x -2

⇒ x^3 + 2x^2 - x -2 = 0

⇒ x^2(x + 2) - 1(x + 2) = 0

⇒ (x^2 - 1)(x + 2) = 0

⇒ x^2 - 1 = 0 and x + 2 = 0

⇒ x^2 - 1 = 0

⇒ x^2 = 1

⇒ x = ± 1 = 1, - 1

or, x + 2 = 0

⇒ x = - 2

Thus, the all roots are equation are 1, - 1 and - 2.

You might be interested in
How do you convert 12 over 100 to a percentage ​
vova2212 [387]

Answer:

12%

Step-by-step explanation:

A percent is any fraction with 100 as a denominator. So \frac{12}{100} is the same as 12% and 4 over 100 is the same as 4%

Here's an easy was to remember, there are 100 pennies to make a dollar that like per-CENT it's out of 100.

Hope that helps and have a great day!

3 0
3 years ago
Read 2 more answers
Exponential Function assignments help please! ❤️
Sladkaya [172]

Answer:

Initial value is 4,000

Growth is -480

Step-by-step explanation:

Initial value is the value that you started with: hence 4000.

Growth would be how much it grows, it grows downward because it is 12% down. Next you need to find what 13% of 4000 is 100%-13%=88% .88*4000=480 or 13% of 4000.

Hope this helps

7 0
3 years ago
In California, we need more rain to sustain the health of our natural environment, argriculture, and
astra-53 [7]

Answer:

In California, we need more rain to sustain the health of our natural environment, argriculture, and economic. A group of statistics students in Oxnard College recorded the amount of rain during 2016-2017 school year, measuring the intensity by the inches of rain, and the results were:

Inches of Rain 1 2 3 4 5 6

Frequency 2 4 3 3 7 3

The mean (¯xx¯) rain intensity: ____ inches (Please show your answer to 1 decimal place.)

The median rain intensity: __3.8__ inches

Step-by-step explanation:

the answer is 3.8

4 0
3 years ago
6 x 10 5 is how many times the value of 3 x 10 (Hint: Write your answer in standard form.)​
JulijaS [17]

Answer:

0.000036

Explanation:

When multiplying a number by 10 to the power of a positive exponent (e.g.  

10

3

), move the decimal in the number that many spaces to the right (e.g.  

4.5

⋅

10

3

=

4500

).

When multiplying a number by 10 to the power of a negative exponent (e.g.  

10

−

4

), move the decimal in the number (the absolute value of) that many spaces to the left (e.g.  

4.5

⋅

10

−

4

=

0.00045

).

For  

3.6

⋅

10

−

5

, move the decimal five spaces to the left:

0.000036

Step-by-step explanation:

5 0
3 years ago
A pet store sells mice, reptiles, and birds.
kirill115 [55]

Answer:

The answer is C.

8 0
3 years ago
Other questions:
  • A field has 7,363 1/8 square feet. The width of the field is 62 1/4 feet. Estimate the length of this field.​
    15·1 answer
  • Write and solve an equation.
    7·1 answer
  • Studt the list of numbers and use it’s pattern to predict the next three numbers describe the pattern
    12·2 answers
  • F(x) = x + 7, g(x) = x - 7<br> (a) (f + g)(x) =<br> (b) (f-g)(x)=<br> (c) (fg)(x)=<br> (d) (f/g)(x)=
    6·1 answer
  • 780000 is the successor of what
    9·1 answer
  • Simplity<br> –6+ {14 + 2 [60 – 9 (1 + 3)]}<br> Enter your answer in the box.
    10·1 answer
  • A city orchestra invests $5200 at 6% simple interest. How much is in the account after 1/2 year?
    10·1 answer
  • Help please. i need it asap!
    6·1 answer
  • Need help,will give 20 points.Use the rectangle to find the measure of the following angles measure ane BAC=25
    8·1 answer
  • There are 20 girls and 15 boys in the class. How many different five-member teams could be formed if each team should be compose
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!