Answer
$2(d^2+4)(2d-3)$
Work Step by Step
$4d^3-6d^2+16d-24$
Factor out the GCF
$=4d(d^2+4)-6(d^2+4)$
Factor by grouping
$=(d^2+4)(4d-6)$
$=2(d^2+4)(2d-3)$
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