How do i factor this completely

6(3x+2)^2 - 3(3x+2) - 8

6(3x +2)^2 - 3(3x +2) - 8 =
= 6*(3*x +2)^2 -3*(3*x +2) -8
= 54*x^2 +63*x +10
= 54*(x +0.977)*(x +0.19)

this is not possible.

This is not factorable.

not factorable
none of the terms have a common multiple