(х-у)² - (х+у)² / 2х = (х-у-х-у)(х-у+х+у) / 2х = -4ху / 2х = -2у
ответ: -2
(х-у)^2-(x+y)^2|2x=((x-y)-(x+y))((x-y)+(x+y))|2x=(x-y-x-y)(x-y+x+y)|2x=-2y*2x|2x=-2y
ответ:-2
(х-у)² - (х+у)² / 2х = (х-у-х-у)(х-у+х+у) / 2х = -4ху / 2х = -2у
ответ: -2
(х-у)^2-(x+y)^2|2x=((x-y)-(x+y))((x-y)+(x+y))|2x=(x-y-x-y)(x-y+x+y)|2x=-2y*2x|2x=-2y
ответ:-2