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OpenStudy (anonymous):
How many real roots describe the given polynomial function? f(x) = 8x^3 - 2x^2 - 15x
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OpenStudy (kagıtucak):
f(x)=x[8x^2-2x-15]=x(4x+5)(2x-3)=0 Thus, x=0, x=-5/4, x=3/2 are the real roots and there are three of them
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