Question

What does Descartes' rule of signs tell us about the number of positive real zeros and the number of negative real zeros of the function? $r(x) = x^4 - 9x^2 + 15x - 25$ The possible number of positive real zeros is $\Box$, and the possible number of negative real zeros is $\Box$. (Use a comma to separate answers as needed.)

Name: what does descartes rule of signs tell us about the number of positive real zeros and the number of negative real zeros of the function rx x4 9x2 15x 25 the possible number of positive real 92757
Uploaded: 2020-07-02T18:18:12-08:00
Duration: 1 min 32 s
Channel: Ankit Gupta
Description: what does descartes rule of signs tell us about the number of positive real zeros and the number of negative real zeros of the function rx x4 9x2 15x 25 the possible number of positive real 92757

          What does Descartes' rule of signs tell us about the number of positive real zeros and the number of negative real zeros of the function?
$r(x) = x^4 - 9x^2 + 15x - 25$
The possible number of positive real zeros is $\Box$, and the possible number of negative real zeros is $\Box$.
(Use a comma to separate answers as needed.)

what does descartes rule of signs tell us about the number of positive real zeros and the number of negative real zeros of the function rx x4 9x2 15x 25 the possible number of positive real 92757

Added by Taylor J.

Elementary and Intermediate Algebra

Alan S. Tussy, R. David Gustafson 5th Edition

Instant Answer

Solved by Expert Ankit Gupta

07/02/2020

Step 1

$r(x) = x^4 - 9x^2 + 15x - 25$ The signs of the coefficients are: From $x^4$ (positive) to $-9x^2$ (negative): 1st sign change. From $-9x^2$ (negative) to $+15x$ (positive): 2nd sign change. From $+15x$ (positive) to $-25$ (negative): 3rd sign change. There are 3 Show more…

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What does Descartes' rule of signs tell us about the number of positive real zeros and the number of negative real zeros of the function? $r(x) = x^4 - 9x^2 + 15x - 25$ The possible number of positive real zeros is $\Box$, and the possible number of negative real zeros is $\Box$. (Use a comma to separate answers as needed.)