Question 105272
9b^3, 6b^5, 12b^4
=======================
{{{9b^3}}}= 3*3*3*b*b*b
{{{6b^5}}}=3*2*b*b*b*b*b
{{{12b^4}}}=3*2*2*b*b*b*b
==============================
{{{3b^3}}}
:)