Question

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

Answer 1

let x+iy = Z

z+(2Z+3i)=9
3Z+3i=9
Z+i=9
x+iy+i=9
x+(y+1)i=9

x=9
y+1=0---> y=-1

Answer 2

= 3 - i

Answer 3

what is that @chosenmatt ?

Answer 4

i dont undersand

Answer 5

@ikram002p are you sure you are not hungry this time?

Answer 6

eh why :O
its correct
@ganeshie8 , right ?

Answer 7

Because you have eaten \(3\) there.. :P

Answer 8

3 what why where how who :O

Answer 9

\(3Z + 3i = 9\)

\(Z+i= 9\) ???

Answer 10

oh my !
its like the worst mistake xD

Answer 11

its ok , then x=3 not 9 :P

Answer 12

What : \(3\)
Why : you have eaten, so you know the best.
Where : on very first comment on this post.
How : you only know. :P
Who : YOU.. :P

Answer 13

thats one of the main reasons why i let the OP do most of the work ;p

Answer 14

haha lol xD u never mad such a mistake xD

Answer 15

made*

Answer 16

OP?

Answer 17

and by cheking there is no need in x, y sub
only
z+i=3
z=3-i
x+yi=3-i