2х 5у 2х * (х + 11) 5у * (х - 11)
----------- и ------------- = ------------------------- и -------------------------- =
х - 11 х + 11 (х - 11) * (х + 11) (х - 11) * (х + 11)
2х² + 22х 5ух - 55х
---------------------------- и ---------------------------- =
х² + 11х - 11х - 121 х² + 11х - 11х - 121
2х² + 22х 5ух - 55х
---------------------- и -----------------------
х² - 121 х² - 121