3х(4-2х)-6-2х+4

Let's simplify the expression step by step:

3х(4-2х) - 6 - 2х + 4

First, distribute the 3х to both terms inside the parentheses:

= 12х - 6х^2 - 6 - 2х + 4

Next, combine like terms with the x variable:

= -6х^2 + (12х - 2х) - 6 + 4

= -6х^2 + 10х - 2

Finally, combine the constants:

= -6х^2 + 10х - 2

So the simplified expression is -6х^2 + 10х - 2.