Simplify the expression.

12x(x+2) - 5(2x-1)

To simplify, we need to distribute the coefficients:

12x(x+2) - 5(2x-1)

= 12x^2 + 24x - 10x + 5

= 12x^2 + 14x + 5

Therefore, the simplified expression is 12x^2 + 14x + 5.

To simplify the expression 12x(x+2) - 5(2x-1), we can start by using the distributive property to remove the parentheses:

12x(x+2) - 5(2x-1) = 12x * x + 12x * 2 - 5 * 2x - 5 * -1

Simplifying further, we get:

12x^2 + 24x - 10x + 5

Combining like terms, we have:

12x^2 + 14x + 5

So, the simplified expression is 12x^2 + 14x + 5.