Question 273148
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Use the distributive property:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 3i(2\ -\ 3i)\ =\ 3i\cdot2\ -\ 3i\cdot3i]


Remember: *[tex \LARGE i\cdot i\ =\ -1]



*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 3i\cdot2\ -\ 3i\cdot3i\ =\ 6i\ -\ 9(-1)\ =\ 9\ +\ 6i]


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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