Question

Find x and y if :(x+iy) +(7-5i)=9+4i

Answer 1

Given (x+iy) + (7-5i) = 9 + 4i can be written as

          (x + 7) + (y - 5)i = 9 + 4i

          x + 7 = 9 = > x = 2

          y - 5 = 4 = > y = 9.


Hope this helps!        

Answer 2

Heya user,
----> ( x + iy ) + ( 7 - 5i ) = 9 + 4i
===> ( x + iy ) = 9 + 4i - 7 + 5i
===> ( x + iy ) = 2 + 9i

Now, comparing Real and Imaginary parts :->
-----> x = 2; y = 9 ;