Answer :
8 x³ - 2x = 0
2x (4 x² - 1 ) = 0
2 x (2x + 1) ( 2x - 1) = 0
x = 0 or x = -1/2 or x = 1/2
2x (4 x² - 1 ) = 0
2 x (2x + 1) ( 2x - 1) = 0
x = 0 or x = -1/2 or x = 1/2