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Mathematics 25 Online
OpenStudy (anonymous):

part 1: What are the possible number of positive, negative, and complex zeros of f(x) = –2x^3 – 5x^2 + 6x + 4 ? Part 2: Use complete sentences to explain the method used to solve this equation.

OpenStudy (ranga):

Apply Descartes' Rule of Signs.

OpenStudy (ranga):

https://www.youtube.com/watch?v=MVX2vYlc24k

OpenStudy (ranga):

f(x) = –2x^3 – 5x^2 + 6x + 4 How many times does the coefficients change signs here?

OpenStudy (anonymous):

i figured it out. you know how i would solve this f(x) = –2x^3 – 5x^2 + 6x + 4

OpenStudy (ranga):

Have you been taught rational roots theorem?

OpenStudy (anonymous):

yeah

OpenStudy (ranga):

What are the possible roots of –2x^3 – 5x^2 + 6x + 4 = 0 ?

OpenStudy (anonymous):

|dw:1396838998804:dw| you want me to try all the possible roots in this thing until i have no remainder?

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