The expression given is:

$4(2x + 3)$

To simplify, apply the distributive property by multiplying 4 with both terms inside the parentheses:

$4 \times 2x = 8x$ $4 \times 3 = 12$

So, the simplified expression is:

$8x + 12$

Would you like further details or have any questions?

Here are 5 related questions:

1. How would you simplify $3(5x - 4)$?
2. Can you apply the distributive property to $2(3x^2 + 4x - 5)$?
3. What is the reverse process of simplifying, called factoring?
4. How do you simplify $-7(2x + 5)$?
5. Can you simplify $6(2x + 1) + 3x$?

Tip: The distributive property allows you to multiply a single term across terms in parentheses easily, which is a fundamental skill in algebra!