Question

can someone help?!

Answer 1

if (2+i)(x+iy)=5-5i then x+y=?

Answer 2

@ikram002p

Answer 3

(2+i)(x+iy)=5-5i
use distribution

Answer 4

shouldn't i multiply it o.O

Answer 5

(2+i)(x+iy) =2x+2iy+ix-y
multiply of terms =distribution

Answer 6

^_^ seems got it

Answer 7

but what then..i got stuck

Answer 8

ok
2x+2iy+ix-y =(2x-y)+(2y+x)i
2x-y is the real part
2y+x is the imaginary part

Answer 9

i got till there

Answer 10

but i still have that i..

Answer 11

well
(2x-y)+(2y+x)i=5-5i
so
2x-y=5
2y+x=-5

Answer 12

see , no i left

Answer 13

omg this was so easy lol..thank you!

Answer 14

np :)
hope u to find all of problems u have easy as well ;)

Answer 15

thanks :)

Answer 16

:)