Complex Numbers: how to do -9i (4 - 3i)

[charle92299]

Can someone please solve and more importantly explain how to do the following problem: -9i(4-3i)

 

[Deleted member 4993]

Can someone please solve and more importantly explain how to do the following problem: -9i(4-3i)

same way you would calculate:

-9 * a * (4 - 3 * a) = ? ..... then replace a with i and a² with i² and simplify further....

What are your thoughts?

Please share your work with us ...even if you know it is wrong

If you are stuck at the beginning tell us and we'll start with the definitions.

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