Question

calcule as seguintes somas:  a) (2+5i)+(3+4i) 
b) i+(2-5)

Answer 1

  

a) (2+5i)+(3+4i) = 2+3 + 5i +4i==> 5 + 9i

b) i+(2-5) ==> i - 3

Answer 2

(2+5i)+3+4i=
2+5i+3+4i=
5i+4i+2+3=
9i+5=
9i=-5
i=-5/9