Discussion Forum

If the conjugate  of $(x+iy)(1-2i)$ is (1+i) , then 

Answer:

Explanation:

We have ,

 Conjugate of (x+iy)(1-2i) is 1+i

 i.e, (x-iy)(1+2i)=1+i

 $\Rightarrow$       $x-iy= \frac{1+i}{1+2i}$

 Taking conjugate both sides , we get

   $x+iy=\frac{1-i}{1-2i}$