Question

What are the possible number of positive real, negative real, and complex zeros of
f(x) = –7x4 – 12x3 + 9x2 – 17x + 3?
Answer:

A)Positive Real: 1
Negative Real: 3 or 1
Complex: 2 or 0

B)Positive Real: 3 or 1
Negative Real: 2 or 0
Complex: 1

C)Positive Real: 3 or 1
Negative Real: 1
Complex: 2 or 0

D)Positive Real: 4, 2 or 0
Negative Real: 1
Complex: 0 or 1 or 3
This the last question like this, help me please:)

Answer 1

descartes rule of sign for this one
http://www.purplemath.com/modules/drofsign.htm

Answer 2

three changes of sign in your example,
\[–7x^4 – 12x^3 + 9x^2 – 17x + 3\]
\[–7x^4 – 12x^3_{\text{ here }} + 9x^2_{\text{ here }} – 17x_{\text{ here }} + 3\]

Answer 3

so possible positive roots: 3 or 1

Answer 4

\[f(-x) = –7(-x)^4 – 12(-x)^3 + 9(-x)^2 – 17(-x) + 3\]
\[f(-x) = –7x^4 + 12x^3 + 9x^2 + 17x + 3\] this has one change in sign

Answer 5

so one possible negative root. degree is 4, so there are 4 roots in total
Positive Real: 3 or 1
Negative Real: 1
Complex: 2 or 0

Answer 6

Okay thank you very much!:))

Answer 7

yw
btw the link i sent has a brief clear explanation with examples, if you have to take a test on this it is easy enough with a little practice

Answer 8

okay thank you, i am understanding bits and pieces of this lesson:)

Answer 9

What is the most important reason for using hydrates in fire extinguishers?

Answer 10

As part of a class project, a university student surveyed the students in the cafeteria lunch line to look for a relationship between eye color and hair col

Answer 11

Mandy obtains a $155,000 20/6 balloon mortgage with a rate of 4.25%. What will he

Answer 12

how

Answer 13

k

Answer 14

Use a tree diagram to explain why the probability that a

Answer 15

What is the probability of rolling a die with the sum greater than or equal to 5?

Answer 16

Data Management (probability):
The Leafsu2019 coach stated that u201cthe likelihoodof us winning the next game are 2/9, the likelihood of tying the next ga

Answer 17

Data Management: A jury of 12 people is to be chosen randomly from a list containing 10 men and 12 women.

Answer 18

CALCULUS II: solve \[\huge{\int\sin^{p-1}\theta d\theta}\]

Answer 19

Choose the correct answers.

Suzie Speedy is insured for bodily injury in the amount of 10/20.

Answer 20

The graph below shows the relationship between the number of cookies made and the number of pans used:

A graph is shown.

Answer 21

Stella set up a business washing cars. She earned $80 in March. She is projected to earn 130% more in April.

Answer 22

Check please
http://prntscr.com/k8xotl

Answer 23

What is one purpose of Samuel Thurston's article?

Answer 24

Steve needs to take at least 24 milligrams of calcium, 15 milligrams of iron, and 16 milligrams of vitamins.

Answer 25

After years of overhunting, environmental scientists have reintroduced wolverines to Yellowstone National Park.

Answer 26

Which of the following scenarios would be most likely to characterize the individual in the blue shirt?
He is an apprentice training to learn a trade.

Answer 27

Hemophilia is a gender-linked blood disorder in humans. The gene responsible for it is gene-linked recessive, meaning it is present on the X chromosome.

Answer 28

Prompt
Write a short script (15u201320 lines) that creates an imagined scene between two or three characters.