C

2010013308

Level: 
C
Find the solution set of the following quadratic equation in the complex plane. \[ 2x^2-(2-4\mathrm{i})x + 3 - 2\mathrm{i}= 0 \]
\( \left\{ \frac12+\frac12\mathrm{i}; \frac12-\frac52\mathrm{i} \right\} \)
\( \left\{ \frac12+\frac12\mathrm{i}; \frac12-\frac12\mathrm{i} \right\} \)
\( \emptyset \)
\( \left\{ -\frac12-\frac12\mathrm{i}; -\frac12+\frac52\mathrm{i} \right\} \)
\( \left\{ 1+\mathrm{i}; 1-5\mathrm{i} \right\} \)

2010013208

Level: 
C
Which of the given quadratic equations has the roots \( x_1 = -1 - 3\mathrm{i} \) and \( x_2 = 1 +3\mathrm{i} \)?
\( x^2 + (3 - 3\mathrm{i}) + 5 - 3\mathrm{i} = 0 \)
\( x^2 - (3 - 3\mathrm{i}) + 5 + 3\mathrm{i} = 0 \)
\( x^2 + (3 - 3\mathrm{i}) + 5 + 3\mathrm{i} = 0 \)
\( x^2 - (3 - 3\mathrm{i}) + 5 - 3\mathrm{i} = 0 \)

2010013207

Level: 
C
Find the complex roots of the following quadratic equation. \[ 2x^2 + 5\mathrm{i} = 0 \]
\( x_1=-\frac{\sqrt5}2+\frac{\sqrt5}2\mathrm{i},\ \ x_2=\frac{\sqrt5}2-\frac{\sqrt5}2\mathrm{i} \)
\( x_1=\frac{\sqrt5}2+\frac{\sqrt5}2\mathrm{i},\ \ x_2=-\frac{\sqrt5}2-\frac{\sqrt5}2\mathrm{i} \)
\( x_1=\frac{\sqrt5}2\mathrm{i},\ \ x_2=-\frac{\sqrt5}2\mathrm{i} \)
\( x_1=-\frac{\sqrt5}2,\ \ x_2=\frac{\sqrt5}2\)

2010013206

Level: 
C
Find the complex roots of the following quadratic equation. \[ 3\mathrm{i}x^2 + 2 = 0 \]
\( x_1=\frac{\sqrt3}3+\frac{\sqrt3}3\mathrm{i},\ \ x_2=-\frac{\sqrt3}3-\frac{\sqrt3}3\mathrm{i} \)
\( x_1=-\frac{\sqrt3}3+\frac{\sqrt3}3\mathrm{i},\ \ x_2=\frac{\sqrt3}3-\frac{\sqrt3}3\mathrm{i} \)
\( x_1=-\frac{\sqrt3}6+\frac{\sqrt3}6\mathrm{i},\ \ x_2=-\frac{\sqrt3}6-\frac{\sqrt3}6\mathrm{i} \)
\( x_1=\frac{\sqrt3}6+\frac{\sqrt3}6\mathrm{i},\ \ x_2=-\frac{\sqrt3}6-\frac{\sqrt3}6\mathrm{i} \)

2010013205

Level: 
C
Find the complex roots of the following quadratic equation. \[ (2-\mathrm{i})x^2-(3-2\mathrm{i})x = 0 \]
\( x_1=\frac85-\frac15\mathrm{i},\ \ x_2=0 \)
\( x_1=\frac85+\frac15\mathrm{i},\ \ x_2=0 \)
\( x_1=-\frac85-\frac15\mathrm{i},\ \ x_2=0 \)
\( x_1=-\frac85+\frac15\mathrm{i},\ \ x_2=0 \)