Question

nothing

Answer 1

In this context, rationalize means you'll want to find a way to get rid of the i's on the bottom. First step is to combine like terms down there.

Answer 2

Actually, it looks you got the correct answer to me.

Answer 3

I don't think you did it right.

you combined like terms on the bottom to get 7+4i which was correct
then you multiplied the numerator & denominator incorrectly

Answer 4

oh wait I think mine is wrong, I may have dropped a negative somewhere

Answer 5

yep you are right :)