Factor the expression completely 28x^2+8

To factor the expression 28x^2 + 8 completely, we can first factor out the greatest common factor (GCF), which is 4:

4(7x^2 + 2)

The expression 7x^2 + 2 cannot be factored any further, so the completely factored expression is:

4(7x^2 + 2)