Question 76594
If we foil {{{(3b + 6)(2b - 10)}}} we get
{{{(3b + 6)(2b - 10)=6b^2-30b+12b-60=6b^2-18b-60}}}
So we're looking for the GCF in {{{6b^2-18b-60}}} which we can clearly see its 6. So the GCF is 6.