$$(2 \sqrt{ 3 } +1)(1+2 \sqrt{ 3 } )$$
$4\sqrt{3}+13\approx 19.92820323$
$$\left(2\sqrt{3}+1\right)^{2}$$
$$4\left(\sqrt{3}\right)^{2}+4\sqrt{3}+1$$
$$4\times 3+4\sqrt{3}+1$$
$$12+4\sqrt{3}+1$$
$$13+4\sqrt{3}$$
Show Solution
Hide Solution
$4 \sqrt{3} + 13 = 19.92820323$
