Question

Oblicz:(-2 i 1/3)+1 i 5/7= -1 i 1/5 +(-2 i 2/3

Answer 1

(-2 i 1/3)+1 i 5/7=(- 2 i 7/21) + 1 i 15/21 = - (1 i 28/21 - 1 i 15/21 ) = - 13/21

 

-1 i 1/5 +(-2 i 2/3) = (-1 i 3/15) + (-2 i 10/15) = (- 3 i 13/15)