Question 1127716
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What are the zeros of the polynomial function?

{{{ f(x) = x^4 - 4x^3 - 22x^2 + 4x + 21 }}}

Select EACH correct answer.
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Four of them easily found using synthetic division to check:
A, B, D, F.


A. -3 

B. -1

<s>C. 0</s>

D. 1

<s>E. 3</s>

F. 7



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