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43 votes
43 votes
The problem is (-5+i)/2iI would like a clear explanation on the process of doing it. I am having trouble understanding the concept, so a very clear explanation would be helpful.

User JerseyMike
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1 Answer

15 votes
15 votes

In order to simplify the expression, let's divide each term in the numerator by the denominator:


(-5+i)/(2i)=(-5)/(2i)+(i)/(2i)=-(5)/(2i)+(1)/(2)

Then, to remove the complex number i from the denominator of the first fraction, let's multiply the numerator and denominator by i:


-(5)/(2i)+(1)/(2)=-(5\cdot i)/(2i\cdot i)+(1)/(2)=(-5i)/(2i^2)+(1)/(2)=(-5i)/(2\cdot(-1))+(1)/(2)=(-5i)/(-2)+(1)/(2)=(5)/(2)i+(1)/(2)

Therefore the complex number in the form a + bi is equal to 1/2 + (5/2)i.

User Evangelina
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2.7k points
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