Question 267876
how do you get the quotient for -9/i in the form a + bi 
Multiply NUM and DEN by i
= -9i/i^2
= 9i
It is in a + bi form, a = 0
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how do you get the quotient for 

9+3i 
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4 -8i
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Multiply NUM and DEN by the conjugate of the DEN 4+8i
= (9+3i)*(4+8i)/(16+64)
= (12 + 84i)/80
= (3+21i)/20
or (3/20)*(1+7i)