(2-i)(2/5 + 1/5i)
(2 - i)(2/5 + 1/5i) = factor 1/5 from the second term
(1/5) (2 - i) (2 + i) =
(1/5) (4 - i^2) =
(1/5) ( 4 - -1) =
(1/5) (5) =
1