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Descartes' Rule of signs Use Descartes' Rule positive and how of Signs to determine how many...

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Basic Math

Descartes' Rule of signs Use Descartes' Rule positive and how ofSigns to determine how many negative real zeros of the polynomialcan have. Then determine the possible total number of realzeros.

P(x) = x^3 - x^2 - x - 3

P(x) = 2x^3 - x^2 + 4x -7

P(x) = 2x^6 + 5x^4 - x^3 -5x -1

P(x) = x^4 + x^3 + x^2 + x + 12

P(x) = x^5 + 4x^3 - x^2 + 6x

P(x) = x^8 - x^5 + x^4 - x^3 + x^2 - x + 1

*** Please explain to me very detaily***

Thank you very much.

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