The expression \( 8x + 4 \) can be simplified or factored, depending on what you need.
If you'd like to factor it, you can factor out the greatest common factor, which is 4:
\[ 8x + 4 = 4(2x + 1) \]
If you have a specific question regarding the expression, such as solving for \( x \) or using it in an equation, please let me know!