1)
(х²-8х+16) / (8-2х) =
= (х-4)² / (2*(4-х)) =
= (х-4)(х-4) / (-2*(х-4)) =
= -(х-4) / 2,
2)
(4+в²-4в) / (в²-4) =
= (в²-4в+4) / (в-2)(в+2) =
= (в-2)² / (в-2)(в+2) =
= (в-2)(в-2) / (в-2)(в+2) =
= (в-2) / (в+2)