Hey MickyD
allways fun to fight you, allways great sportsmanship! Only once close to the edge when it came down on premier league, Liverpool vs Stoke City FC

Shame on me, but i was laughing my Butt off

Take care mate and fingers crossed for your exams mate! Still remember
(x1 + i*x2) * (y1 + i*y2) =
x1*y1 + i*x1*y2 + i*x2*y1 + i*i*x2*y2 =
x1*y1 + i*(x1*y2 + x2*y1) + (-1)*x2*y2 =
x1*y1 - x2*y2 + i*(x1*y2 + x2*y1)
Cheers!