-9+12i/1+2i

Alan has done some mind reading and answered what he assume the question was.

Thanks Alan.

If you are clever enough to do maths at this level then you are clever enough to ask your question properly!

-9+12i/1+2i

This the question Alan has answered

Simplify the following complex expression and make the denominator real. 

(-9+12i)/(1+2i)    

$$$$\frac{-9+12i}{1+2i}=\frac{(-9+12i)(1-2i)}{(1+2i)(1-2i)}$$\\
$$ = \frac{-9-18i+12i+24}{1-2i+2i+4}$$\\
$$ = \frac{15-6i}{5}$$

$$$$ = 3-1.2i$$$$

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