|2√3-4|*(2√3-4)+16√3

[latex]2\sqrt3\approx 2\cdot 1,7=3,4\ \textless \ 4\; \; \; \Rightarrow \; \; \; |2\sqrt3-4|=-(2\sqrt3-4)=4-2\sqrt3\\\\\\|2\sqrt3-4|\cdot (2\sqrt3-4)+16\sqrt3=(4-2\sqrt3)\cdot (2\sqrt3-4)+16\sqrt3=\\\\=-(2\sqrt3-4)\cdot (2\sqrt3-4)+16\sqrt3=-(2\sqrt3-4)^2+16\sqrt3=\\\\=-(4\cdot 3-16\sqrt3+16)+16\sqrt3=-12+16\sqrt3-16+16\sqrt3=\\\\=-28+32\sqrt3[/latex]