Answer
$2x(x+7)(3x-2)$
Work Step by Step
Given expression:
$2x(3x^{2}+19x-14)$
Now, $-14\times3=$$-2\times21$
Therefore, write $19x$ as $(-2x+21x)$
This becomes :
$=2x(3x^{2}-2x+21x-14)$
$=2x(x(3x-2)+7(3x-2))$
$=2x((x+7)(3x-2))$
$=2x(x+7)(3x-2)$