Q54 / 160 · AP EAMCET 2018 (22 Apr Shift 2) · Mathematics
The minimum degree of a polynomial equation with rational coefficients having $\sqrt{3}+\sqrt{27}, \sqrt{2}+5 i$ as two of its roots is
- A8
- Correct answerB6
- C4
- D2
Solution
The polynomial equation with rational coefficients having $\sqrt{3}+\sqrt{27}, \sqrt{2}+5 i$ as two roots. Then, other roots are
$$
\begin{aligned}
& \sqrt{3}-\sqrt{27} \text { and } \sqrt{2}-5 i \\
& -\sqrt{3}+\sqrt{27} \text { and }-\sqrt{3}-\sqrt{27}
\end{aligned}
$$
Therefore, number of roots are 6 and the minimum degree of a polynomial equation having 6 distinct roots is 6 .
Hence, the correct answer is option: 'B'.