8*x^3 + 12x^2 + 6x +1=0

Question

8*x^3 + 12x^2 + 6x +1=0

Answer 1

8×^3+12×^2+6×+1=0
(2×+1)(4×^2-2×+1)+6×(2×+1)=0
(2×+1)(4×^2+4×+1)=0
(2×+1)( 2×+1)^2=0
(2×+1)^3=0
2×=1
×=0,5