Need help if (x+yi)+(2(x+yi)+3i)=9,what is x+yi?

A

Step-by-step explanation:

(x+yi)+(2(x+yi)+3i)=9

x+yi+2x+2yi+3i=9

3x+3yi+3i=9+0i

equating real and imaginary parts

3x=9,x=9/3=3

3y+3=0

3y=-3

y=-3/3=-1

x+yi=3-i

your answer would be 12

step by step solution :

step   1   :

1.1     4 = 22

(4)3 = (22)3 = 26

equation at the end of step   1   :

  ((23) • 26)2

step   2   :

equation at the end of step   2   :

  (23 • 26)2

step   3   :

final result :

  218

ya