Question

If (x+yi)+(2(x+yi)+3i)=9, what is (x+yi)?

Answer 1

A. 3 − i

Explanation:

This is correct

Answer 2

x + yi + 2x + 2yi + 3i = 9 this first step is just distributing the 2

3x + 3yi = -3i + 9 this step is adding like terms

x+ yi = 3 - i this step is dividing by 3 to all terms... Lowest common factor
then subtracting 3i to the right side of the equation

so x =3 and y= -1
if that the full question?