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And imaginary roots for f (x) = x5 – x4 + 3x3 + 9x2 – x + 5. • (Pag-pronounce ng Descartes, silent ang “s” kaya “dekart” ang bigkas nito “dekart’s” naman ang bigkas ng “Descartes’ “) Ginagamit ang Descartes’ Rule of Signs SA pagbilang ng posibleng combo ng positive roots at negative roots at SA gayon..
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