Bonjour,
2c)
[tex]Z_1= \sqrt{6} +i \sqrt{6} \\
\overline{Z_1}= \sqrt{6} -i \sqrt{6} \\
-\overline{Z_1}= -\sqrt{6} +i \sqrt{6} =Z_2\\
[/tex]
3a)
[tex]Z_1= 1 +i \sqrt{3}=2\ \angle{60^o} \\
Z_2= \sqrt{3}-i=2\ \angle{-30^o } \\
Z_1*Z_2=4\ \angle{30^o }
[/tex]
4c)
[tex] \dfrac{1+i}{2+i} = \dfrac{(1+i)(2-i)}{2^2+1^2} = \dfrac{3+i}{5} [/tex]
