Express the following expressions in the form of \( a+i b \) :
(i) ...
Express the following expressions in the form of \( a+i b \) :
(i) \( \quad \) (5i) \( \left(-\frac{3}{5} \mathrm{i}\right) \)
(ii) \( \mathrm{i}^{9}+\mathrm{i}^{19} \)
\( \mathrm{P} \)
W
(iii) \( \quad 3(7+7 \mathrm{i})+\mathrm{i}(7+7 \mathrm{i}) \)
(iv) \( \frac{(3+\mathrm{i} \sqrt{5})(3-\mathrm{i} \sqrt{5})}{(\sqrt{3}+\sqrt{2} \mathrm{i})-(\sqrt{3}-\sqrt{2} \mathrm{i})} \)
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