By Vieta
u + v = -5/3 square both sides
u^2 + 2uv + v^2 = 25/9 (1)
and
uv = 11/3 (2)
And
u/v + v/u = ( u^2 + v^2 ) / uv (3)
Using (1) and (2)
u^2 + 2uv + v^2 = 25/9
u^2 + 2 (11/3) + v^2 = 25/9
u^2 + v^2 = 25/9 - 2 (11/3)
u^2 + v^2 = 25/9 - 22/3
u^2 + v^2 = 25/9 - 66/9 = -41/9
So (3) becomes
(-41 / 9) / (11/3) = ( -41 /9 ) * ( 3 /11 ) = (-41/11) ( 3/9) = ( -41/11) (1/3) = -41/33 = u/v + v/u