2х(х² - 4)/4х²(х + 2) = (х - 2)(х + 2)/2х(х + 2) = (х - 2)/2х
При х = 4, (4 - 2)/8 = 0.25
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2х(х² - 4)/4х²(х + 2) = (х - 2)(х + 2)/2х(х + 2) = (х - 2)/2х
При х = 4, (4 - 2)/8 = 0.25