Find a rational zero of the polynomial function and use it to find all the zeros of the function.f(x) = 3x3 - x2 - 21x + 7
A. {
, 
, - 
}
B. {-3, 
, - 
}
C. {3, 
, -
}
D. {- 
, 
, - 
}
Answer: A
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A. 80% B. 20% C. 1% D. 8%
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