Odpowiedź:
(x² - 16) (2x² - 32) = 0
x² - 16 = 0 v 2x² - 32 = 0
x² - 16 = 0 v x² - 16 = 0
x² - 16 = 0
(x - 4)(x + 4) = 0
x - 4 = 0 v x + 4 = 0
x = 4 v x = - 4
