To simplify the expression $6(x + 8)$, you need to distribute the 6 to both terms inside the parentheses.

$6(x + 8) = 6 \cdot x + 6 \cdot 8$

This simplifies to:

$6x + 48$

So, the simplified form of the expression is $6x + 48$.

Would you like any further details or have any questions?

Here are 5 numbered questions you might want to ask:

1. How do I factor polynomials?
2. Can you explain the quadratic formula?
3. What are the properties of exponents?
4. How do I solve linear equations?
5. Can you explain the difference between permutations and combinations?

Tip: Always distribute multiplication over addition inside parentheses first when simplifying expressions.