To factor the expression \( 12x + 10 \) completely, we first look for the greatest common factor (GCF) of the terms.
The coefficients are 12 and 10. The GCF of 12 and 10 is 2.
Now we can factor out the GCF, which is 2:
\[ 12x + 10 = 2(6x + 5) \]
So the completely factored form of \( 12x + 10 \) is:
\[ 2(6x + 5) \]