since in both cases have a monomial as its denominator, all we have to do is mutiply by i/i
I will do the first, you do the second
(2+4i)/i
= (2+4i)/i * i/i
= (2i + 4i^2)/i^2
= (2i - 4)/-1
= 4 - 2i
(remember i^2 = -1)
What can you multiply an expression by to eliminate the imaginary part of the denominator?
1.) (2+4i)/3i=
2.) (1-2i)/2i=
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