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OpenStudy (anonymous):
What are the possible number of positive real, negative real, and complex zeros of f(x) = 8x4 + 13x3 – 11x2 + x + 9?
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OpenStudy (anonymous):
If you have a graphing calculator, type the graph in and take a quick look. You will see two negative real zeros, and then the graph does not cross the x-axis again. Since you have a fourth degree polynomial, you should have four zeros, and the remaining two zeros must be nonreal complex.
OpenStudy (anonymous):
thank you!
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