(2x+1)(3x-1)(4x-1)=0
6х²- 2х +3х -1 * (4х -1) =0 6х² + х -1 = 0 ; и 4х-1=0; Д=1+24=25; 4х= 1 х1 = (-1 - 5)/ 6; х = 1/4 х1= - 6 : 6 = -1; х= 0,25 х2 = (-1 +5)/6 = 4/6 =2/3.