((х+2)² - 2*(х+2) - 8) / (х²-16) =
= (х²+4х+4 - 2х-4 - 8) / (х-4)(х+4) = (х² + 2х - 8) / (х-4)(х+4),
х ≠ 4, х ≠ -4
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((х+2)² - 2*(х+2) - 8) / (х²-16) =
= (х²+4х+4 - 2х-4 - 8) / (х-4)(х+4) = (х² + 2х - 8) / (х-4)(х+4),
х ≠ 4, х ≠ -4