Answer
$2d(d^{2} -1) (3d + 2)$
Work Step by Step
$6d^{4} + 4d^{3} - 6d^{2} - 4d$
We see the terms have a common factor of 2d so we factor the 2d out.
$2d(3d^{3} + 2d^{2} - 3d - 2$)
Factor by grouping, group the first two terms and last two terms together.
$2d(3d^{3} + 2d^{2}) (- 3d - 2)$
Factor out the common factors from both parenthesis.
$2d(d^{2} (3d + 2) -1(3d + 2))$
We take $(3d + 2)$ and factor it out which gives us.
$2d(d^{2} -1) (3d + 2)$
