Q17 · Practice questionSimple familiar1 mark
QUESTION 17
A monic cubic polynomial with real coefficients has roots and . Its constant term is
(A)
(B)
(C)
(D)
WORKED SOLUTION
1 markAnswer B
ANSWER
B
Worked solution
The conjugate-root theorem gives the third root . Their product is . For a monic cubic, the constant term is the negative of the product, so it is .
Selects the correct option.
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