Factor 12y + 6 using the GCF.

The GCF (greatest common factor) of 12 and 6 is 6. The GCF of y and y (since y is raised to the power of 1) is y. Therefore, the GCF of 12y and 6 is 6y.

To factor 12y + 6 using the GCF, we divide both terms by the GCF:
(12y + 6)/(6y) = 6y(2 + 1)

So, the factored form of 12y + 6 using the GCF is 6y(2 + 1), which simplifies to 6y(3) or simply 18y.