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
Alexus [3.1K]
3 years ago
15

Complete the steps to solve the polynomial equation x3 – 21x = –20. According to the rational root theorem, which number is a po

tential root of the polynomial
–7

0

1

3
Mathematics
2 answers:
Charra [1.4K]3 years ago
5 0

Answer:

Option C

Step-by-step explanation:

We are given that an equationx^3-21x=-20

We have to find the root of given polynomial equation by using rational root theorem.

x^3-12 x+20=0

Factor of 1 is 1.

Factors of 20 are \pm 1,\pm 2,\pm 4,\pm 5,\pm 10,\pm 20

The  roots of given polynomial is in the form

\pm \frac{2}{1},\pm \frac{4}{1},\pm\frac{5}{1},\pm \frac{10}{1},\pm \frac{20}{1}

When we substitute x=1 then we get

1-21+20=0

Therefore, 1 is a root of given polynomial.

Hence, option C is correct.

Artist 52 [7]3 years ago
4 0
X^3 - 21x = -20add 20 to both sidesx^3 - 21 x + 20 = 0Rational Root Theorem:Factors of P (constant) 20 = 1, 2, 4, 5, 10, 20-------------------------------      Factors of Q (leading Coefficient) = 1
Possible zeros (all + -) 1/1, 2/1, 4/1, 5/1, 10/1, 20/1
Of the choices given only the number 1 is a possible root.

You might be interested in
Anyone know this answer?
Alexeev081 [22]

Answer:

try -8/-5 -10

Step-by-step explanation:

7 0
2 years ago
Here are the first four terms in an arithmetic sequence.
finlep [7]

Answer:

88

Step By Step

Step-by-step explanation:

An arithmetic sequence is defined as

an=a+d(n-1) where an=nth term, a=initial term, n=term number, and d=common difference

For sequence 1,4,7... a=1 and d=4-1=7-4=3 so

an=1+3(n-1)

an=3n-2, so the 30th term is

an=3(30)-2

an=88

7 0
3 years ago
Read 2 more answers
George wants to put carpooling in a rectangular living room and a square bedroom the length and width of one of the living room
Jet001 [13]
(12(18))+(13(13))= 216ft squared +169 feet squared = 385 ft squared
385feet squared ($3.50)=$1,347.50
7 0
3 years ago
Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.
const2013 [10]

Answer:

y + 12 = 3(x - 2)

Step-by-step explanation:

Insert the coordinates into the formula with their CORRECT signs. Remember, in the Point-Slope Formula, <em>y</em><em> </em><em>-</em><em> </em><em>y</em><em>₁</em><em> </em><em>=</em><em> </em><em>m</em><em>(</em><em>x</em><em> </em><em>-</em><em> </em><em>x</em><em>₁</em><em>)</em><em>,</em><em> </em>all the negative symbols give the OPPOSITE term of what they really are. Since both lines contain have to have similar <em>rate of changes</em> [<em>slopes</em>], we do not go any further.

8 0
3 years ago
How is this type of problem completed (No. 4)
Rufina [12.5K]
Used subtraction to solve for plates(p).

5 0
3 years ago
Other questions:
  • Lorenzo is planning a 285-mile trip. His car’s EPA rating is 18 mpg. The number of gallons of gas that Lorenzo will need for the
    9·2 answers
  • Whats the distance between point A (-2,-1) and point B (3,2)
    15·1 answer
  • EDGE 2020
    13·1 answer
  • What is the value of -3 to the power of four?
    12·2 answers
  • Simplify by combining like terms: <br><br> 4a + 3(5a - 2)
    11·2 answers
  • Which number complete the inequality​
    9·1 answer
  • PLEASE HELP!!!! I WILL GIVE BRAINLIEST!
    14·1 answer
  • Convert the improper fraction to a mixed number.<br> 17<br> 3
    11·2 answers
  • What best summarizes the data?
    10·1 answer
  • Find the measure of angle 4 and explain.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!