## Algebra 1: Common Core (15th Edition)

$3m$
$9m^{3}+15m^{2}-21m$ ... factor each term. $9m^{3}=(3)\cdot 3\cdot[m]\cdot m\cdot m$ $15m^{2}=(3)\cdot 5\cdot[m]\cdot m$ $21=(3)\cdot 7\cdot[m]$ GCF: $3m$
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