$\overline{z}$ = -5+(-6)i

$\overline{z}$ = 5 + 6i

$\overline{z}$ = 5 - 6i

$\overline{z}$ = -5 + 6i

z = 5 + 3i

z = 5 - 3i

z = 5

z = 3i

Đúng

Sai

14 - 12i

-14 + 12i

-4 + 12i

-4 - 12i

w =  $\frac{21}{34}+\frac{1}{34}i$  

w =  $\frac{9}{34}+\frac{1}{34}i$  

w =  $\frac{9}{\sqrt{34}}+\frac{1}{\sqrt{34}}i$  

w =  $\frac{21}{\sqrt{34}}+\frac{1}{\sqrt{34}}i$  

 $z^{-1}=\frac{1}{5+3i}$  

 $z^{-1}=\frac{5}{34}+\frac{3}{34}i$  

 $z^{-1}=5+3i$  

 $z^{-1}=\frac{5}{\sqrt{34}}+\frac{3}{\sqrt{34}}i$