Question

Use the Rational Zeros Theorem to write a list of all possible rational zeros of the function.

f(x) = -2x4 + 4x3 + 3x2 + 18

Answer 1

please help!!

Answer 2

i cant figure it out :(

Answer 3

(the factors of 18)/(the factors of -2)

Answer 4

2 .. 3 ..-2 ???

Answer 5

wait.. nvm

Answer 6

ie {+/- (1,2,3,6,9,18) } / { +/-(1,2)}

Answer 7

hmmmm.. so would tht be the answer?

Answer 8

all the numbers in that list..

Answer 9

there all the answers?

Answer 10

"...a list of all possible rational zeros of the function."

Answer 11

so in the answer spot would i just put

{+/- (1,2,3,6,9,18) } / { +/-(1,2)}

Answer 12

probably the actual numbers themselves...

Answer 13

ohhok thnkyou

Answer 14

you sure you didn't leave a term out of that expression?

Answer 15

Use the Rational Zeros Theorem to write a list of all possible rational zeros of the function.

f(x) = -2x4 + 4x3 + 3x2 + 18

this is the question that is asked on my quiz ^^^?

Answer 16

there's no term with 'x' ? you're sure??

Answer 17

yeah im sure.. i copied that straight from the page

Answer 18

so would those still be right? or no?

Answer 19

Here is a good explanation:
http://www.cliffsnotes.com/study_guide/Rational-Zero-Theorem.topicArticleId-257309,articleId-257204.html

Answer 20

i looked at tht nd im still comfused :(

Answer 21

naw there's something off about your problem... it's either not* supposed to be using rational roots theorem or the equation isn't right.

Answer 22

see thts wat i thought too
could it be no zeros?

Answer 23

it has real zeros, you just won't find them from rational roots theorem.

Answer 24

hmm.. idk;/

Answer 25

Okee... the constant term is 18 and the coefficient of the highest degree term is -2. Descartes said that if you take all the factors, positive and negative, of those two and make them into all the possible fractions (it's a lot of fractions in this case) one of them is probably a zero. If we call all the factors of the constant term "p" and all the factors of the -2 "q", then we make the fractions like p/q. Try it, it's fun. But it doesn't always work... I prefer graphing.

Answer 26

so... +/- factors of 18: 1,2,3,6,9,18,-1,-2,-3,-6,-9,-18
and... factors of -2: 1,2,-1,-2
When you make the fractions, you'll get 48 fractions, but some of them will reduce to the same values.

Answer 27

1/1, 2/1, 3/1, 6/1, 9/1, 18/1, -1/1, -2/1, -3/1, -6/1, -9/1, -18/1, 1/2, 2/2, 3/2...

Answer 28

so those ^^^ would be the answer id put?

Answer 29

to the question?