APFIVE Polynomial Zeros and Coefficients
The polynomial function $$f(x) = 2x^5 + ax^4 + bx^3 + cx^2 + dx + 6$$ has zeros at $$x = -3$$, $$x = 1$$, and $$x = 2i$$. What is the value of $$a$$?
A
0
B
2
C
3.5
D
-6
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