Question

Use Descartes' Rule of Signs to analyze the number of positive and negative real roots and the number of non-real roots of the function:
h(x)=13x^9−17x^8+13x^7−2x^6+16x^5−8x^4+9x^3+11x^2+7x−8.

Answer 1

help please

Answer 2

@satellite73

Answer 3

@jim_thompson5910

Answer 4

If you're not sure how the rule works, then here's a page that explains it using a few examples

http://www.purplemath.com/modules/drofsign.htm

Answer 5

can u just give an answer

Answer 6

no sorry, read the page over a few times and try out the examples

Answer 7

@Directrix

Answer 8

@Mertsj

Answer 9

@satellite73

Answer 10

@jim_thompson5910 is still don't get it

Answer 11

@Mertsj

Answer 12

I am on the phone right now and why don't you read the stuff Jim told you to read?

Answer 13

i did. i still don't get it

Answer 14

Take it one step at a time. First find the number of positive real roots.

Answer 15

What does it say about the number of sign changes?

Answer 16

Can you count the number of sign changes?

Answer 17

idk