Solve the polynomial equation. In order to obtain the first root, use synthetic division to test the possible rational roots. 3x3 - x2 - 21x + 7 = 0
A. {3, 
, -
}
B. {
, 
, - 
}
C. {- 
, 
, - 
}
D. {-3, 
, - 
}
Answer: B
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Fill in the blank(s) with the appropriate word(s).
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