Factor completely 2x4y3 − 12x3y2 − 8x2y.

2x2y(x2y2 − 6xy − 4)
2(x4y3 − 6x3y2 − 4x2y)
2y(x4y2 − 6x3y − 4x2)
Prime

The completely factored form is: 2x2y(x + 2)(x - 2)(y - 3)