anonymous
  • anonymous
Using complete sentences, describe how you would analyze the zeros of the polynomial function f(x) = -3x5 - 8x4 +25x3 - 8x2 +x - 19 using Descartes' Rule of Signs. Be sure to provide the answer in your explanation.
Mathematics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
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anonymous
  • anonymous
Change in no signs of coefficients is max no of positive roots --+-+- 4 no of continuation of signs are max no of positive roots 1
dumbcow
  • dumbcow
0,2, or 4 Positive zeros 1 Negative zero 0,2, or 4 Complex zeros
anonymous
  • anonymous
\[\huge {f(x) = -3x^{5} - 8x^{4} +25x^{3} - 8x^{2} +x - 19}\] Look to the sign f(x)= - - , -+ ,+- , -+ , +- we are don't care for ++ or -- we are just looking for +- or -+ which means that number of roots . so here we are either we have zero negative ( --) root! or we have 4 roots because we have (-+ , +- , -+ , +- ) which is originally in f(x) function its like what they said above but in details .. Thnx for your Q.

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anonymous
  • anonymous
sorry .. i dont mean i dont care for ++ , or -- .. they just represent zero postive and zero negative .

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