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What are the possible number of positive, negative, and complex zeros of f(x) = 3x^4  5x^3  x^2  8x + 4 ?
 one year ago
 one year ago
What are the possible number of positive, negative, and complex zeros of f(x) = 3x^4  5x^3  x^2  8x + 4 ?
 one year ago
 one year ago

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.Sam.Best ResponseYou've already chosen the best response.1
Well, if they just want the number of roots, then it will be a total of 4 , 2 complex, 2 reals
 one year ago

DeadShotBest ResponseYou've already chosen the best response.0
My teacher wants the possible number of positive real, negative real, and complex. Knowing that there are 2 complex zeroes narrows down the answer.
 one year ago

DeadShotBest ResponseYou've already chosen the best response.0
Is the number of positive real 3 or 1 and the negative 1, or is it vice versa?
 one year ago

.Sam.Best ResponseYou've already chosen the best response.1
Then apply Descartes' Rule, have you learn that before?
 one year ago

.Sam.Best ResponseYou've already chosen the best response.1
I have to go now, there's a tutorial on that here: http://www.purplemath.com/modules/drofsign.htm Try it out :)
 one year ago
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