Х-6у 2у х-6у 2у
----------- - ------------- = ------------------ - ------------ =
х²-4у² 2ху-х² (х-2у)(х+2у) х(2у-х)
х-6у 2у х*( х-6у ) +2у* (х+2у)
= ------------------- + --------------- = -------------------------------------- =
(х-2у)(х+2у) х(х- 2у) х* (х-2у)(х+2у)
х²-6ху +2ху+4у² х²-4ху+4у² (х-2у)²
= ----------------------------- = ---------------------- = ---------------------- =
х*(х-2у)(х+2у) х* (х-2у)(х+2у) х* (х-2у)(х+2у)
х-2у
= ---------------
у*(х+2у)