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Q.

The polynomial equation of the lowest degree having roots 1, 3i  is

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a

x3+x2+3x+3=0

b

x3−x2+3x−3=0

c

x3+x2−3x−3=0

d

x3−x2−3x+3=0

answer is B.

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Detailed Solution

Roots α=1 , β =3 i ,γ =- 3 i(x2+3)(x−1)=0 ⇒x3−x2+3x−3=0
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