3х * (2х³ - 4х) - 12х² = 3х* (2х³ - 4х -4х) = 3х * (2х³ -8х) = 3х*2х*(х²-4) = 3х*2х*(х-2) * (х+2) = 3х² * 2 (х-2) * (х+2) = 3 * 2х² * (х-2) * (х+2) = 6х² * (х-2) * (х+2)
3х * (2х³ - 4х) - 12х² = 3х* (2х³ - 4х -4х) = 3х * (2х³ -8х) = 3х*2х*(х²-4) = 3х*2х*(х-2) * (х+2) = 3х² * 2 (х-2) * (х+2) = 3 * 2х² * (х-2) * (х+2) = 6х² * (х-2) * (х+2)